diff --git a/app/assets/javascripts/admin/components/screened_ip_address_form_component.js b/app/assets/javascripts/admin/components/screened_ip_address_form_component.js
index dbae5a9aac9..f752031ff40 100644
--- a/app/assets/javascripts/admin/components/screened_ip_address_form_component.js
+++ b/app/assets/javascripts/admin/components/screened_ip_address_form_component.js
@@ -50,7 +50,7 @@ Discourse.ScreenedIpAddressFormComponent = Ember.Component.extend({
     }
   },
 
-  didInsertElement: function(e) {
+  didInsertElement: function() {
     var self = this;
     this._super();
     Em.run.schedule('afterRender', function() {
diff --git a/app/assets/javascripts/admin/controllers/admin_api_controller.js b/app/assets/javascripts/admin/controllers/admin_api_controller.js
index 612d81d3e4c..8a0861c6ea4 100644
--- a/app/assets/javascripts/admin/controllers/admin_api_controller.js
+++ b/app/assets/javascripts/admin/controllers/admin_api_controller.js
@@ -13,9 +13,8 @@ Discourse.AdminApiController = Ember.ArrayController.extend({
       Generates a master api key
 
       @method generateMasterKey
-      @param {Discourse.ApiKey} the key to regenerate
     **/
-    generateMasterKey: function(key) {
+    generateMasterKey: function() {
       var self = this;
       Discourse.ApiKey.generateMasterKey().then(function (key) {
         self.get('model').pushObject(key);
diff --git a/app/assets/javascripts/admin/helpers/report_helpers.js b/app/assets/javascripts/admin/helpers/report_helpers.js
index 8086a99ce7c..270adc2c11f 100644
--- a/app/assets/javascripts/admin/helpers/report_helpers.js
+++ b/app/assets/javascripts/admin/helpers/report_helpers.js
@@ -7,7 +7,7 @@
 Handlebars.registerHelper('valueAtTrustLevel', function(property, trustLevel) {
   var data = Ember.Handlebars.get(this, property);
   if( data ) {
-    var item = data.find( function(d, i, arr) { return parseInt(d.x,10) === parseInt(trustLevel,10); } );
+    var item = data.find( function(d) { return parseInt(d.x,10) === parseInt(trustLevel,10); } );
     if( item ) {
       return item.y;
     } else {
diff --git a/app/assets/javascripts/admin/models/admin_user.js b/app/assets/javascripts/admin/models/admin_user.js
index 871deb1f864..911f4cc45ed 100644
--- a/app/assets/javascripts/admin/models/admin_user.js
+++ b/app/assets/javascripts/admin/models/admin_user.js
@@ -31,7 +31,7 @@ Discourse.AdminUser = Discourse.User.extend({
   **/
   revokeApiKey: function() {
     var self = this;
-    return Discourse.ajax("/admin/users/" + this.get('id') + "/revoke_api_key", {type: 'DELETE'}).then(function (result) {
+    return Discourse.ajax("/admin/users/" + this.get('id') + "/revoke_api_key", {type: 'DELETE'}).then(function () {
       self.set('api_key', null);
     });
   },
@@ -51,7 +51,7 @@ Discourse.AdminUser = Discourse.User.extend({
       "label": '<i class="fa fa-exclamation-triangle"></i> ' + I18n.t("admin.user.delete_all_posts"),
       "class": "btn btn-danger",
       "callback": function() {
-        Discourse.ajax("/admin/users/" + (user.get('id')) + "/delete_all_posts", {type: 'PUT'}).then(function(result){
+        Discourse.ajax("/admin/users/" + (user.get('id')) + "/delete_all_posts", {type: 'PUT'}).then(function(){
           user.set('post_count', 0);
         });
       }
@@ -274,7 +274,7 @@ Discourse.AdminUser = Discourse.User.extend({
             user.mergeAttributes(data.user);
           }
         }
-      }, function(jqXHR, status, error) {
+      }, function() {
         Discourse.AdminUser.find( user.get('username') ).then(function(u){ user.mergeAttributes(u); });
         bootbox.alert(I18n.t("admin.user.delete_failed"));
       });
@@ -325,7 +325,7 @@ Discourse.AdminUser = Discourse.User.extend({
           } else {
             bootbox.alert(I18n.t("admin.user.delete_failed"));
           }
-        }, function(jqXHR, status, error) {
+        }, function() {
           bootbox.alert(I18n.t("admin.user.delete_failed"));
         });
       }
diff --git a/app/assets/javascripts/admin/models/api_key.js b/app/assets/javascripts/admin/models/api_key.js
index 7f13ef49ee1..4c21df9a513 100644
--- a/app/assets/javascripts/admin/models/api_key.js
+++ b/app/assets/javascripts/admin/models/api_key.js
@@ -29,7 +29,6 @@ Discourse.ApiKey = Discourse.Model.extend({
     @returns {Promise} a promise that resolves when the key has been revoked
   **/
   revoke: function() {
-    var self = this;
     return Discourse.ajax('/admin/api/key', {type: 'DELETE', data: {id: this.get('id')}});
   }
 
diff --git a/app/assets/javascripts/admin/models/group.js b/app/assets/javascripts/admin/models/group.js
index 3001fd7f924..ce556edd88f 100644
--- a/app/assets/javascripts/admin/models/group.js
+++ b/app/assets/javascripts/admin/models/group.js
@@ -44,7 +44,7 @@ Discourse.Group = Discourse.Model.extend({
     return Discourse.ajax("/admin/groups/" + group.get('id'), {type: "DELETE"})
       .then(function(){
         return true;
-      }, function(error) {
+      }, function() {
         group.set('disableSave', false);
         bootbox.alert(I18n.t("admin.groups.delete_failed"));
         return false;
@@ -108,15 +108,5 @@ Discourse.Group.reopenClass({
     });
 
     return list;
-  },
-
-  find: function(id) {
-    var promise = new Em.Deferred();
-
-    setTimeout(function(){
-      promise.resolve(Discourse.Group.create({id: 1, name: "all mods", members: ["A","b","c"]}));
-    }, 1000);
-
-    return promise;
   }
 });
diff --git a/app/assets/javascripts/admin/models/report.js b/app/assets/javascripts/admin/models/report.js
index 1b79318852e..757fe6f80e6 100644
--- a/app/assets/javascripts/admin/models/report.js
+++ b/app/assets/javascripts/admin/models/report.js
@@ -6,7 +6,7 @@ Discourse.Report = Discourse.Model.extend({
   valueAt: function(numDaysAgo) {
     if (this.data) {
       var wantedDate = moment().subtract('days', numDaysAgo).format('YYYY-MM-DD');
-      var item = this.data.find( function(d, i, arr) { return d.x === wantedDate; } );
+      var item = this.data.find( function(d) { return d.x === wantedDate; } );
       if (item) {
         return item.y;
       }
diff --git a/app/assets/javascripts/admin/models/screened_email.js b/app/assets/javascripts/admin/models/screened_email.js
index d2f524414c1..c2a3065b24a 100644
--- a/app/assets/javascripts/admin/models/screened_email.js
+++ b/app/assets/javascripts/admin/models/screened_email.js
@@ -14,7 +14,7 @@ Discourse.ScreenedEmail = Discourse.Model.extend({
 });
 
 Discourse.ScreenedEmail.reopenClass({
-  findAll: function(filter) {
+  findAll: function() {
     return Discourse.ajax("/admin/logs/screened_emails.json").then(function(screened_emails) {
       return screened_emails.map(function(b) {
         return Discourse.ScreenedEmail.create(b);
diff --git a/app/assets/javascripts/admin/models/screened_ip_address.js b/app/assets/javascripts/admin/models/screened_ip_address.js
index 16fc71382e6..985ee81c394 100644
--- a/app/assets/javascripts/admin/models/screened_ip_address.js
+++ b/app/assets/javascripts/admin/models/screened_ip_address.js
@@ -45,7 +45,7 @@ Discourse.ScreenedIpAddress = Discourse.Model.extend({
 });
 
 Discourse.ScreenedIpAddress.reopenClass({
-  findAll: function(filter) {
+  findAll: function() {
     return Discourse.ajax("/admin/logs/screened_ip_addresses.json").then(function(screened_ips) {
       return screened_ips.map(function(b) {
         return Discourse.ScreenedIpAddress.create(b);
diff --git a/app/assets/javascripts/admin/models/screened_url.js b/app/assets/javascripts/admin/models/screened_url.js
index 592726f4840..60c4f984b4f 100644
--- a/app/assets/javascripts/admin/models/screened_url.js
+++ b/app/assets/javascripts/admin/models/screened_url.js
@@ -13,7 +13,7 @@ Discourse.ScreenedUrl = Discourse.Model.extend({
 });
 
 Discourse.ScreenedUrl.reopenClass({
-  findAll: function(filter) {
+  findAll: function() {
     return Discourse.ajax("/admin/logs/screened_urls.json").then(function(screened_urls) {
       return screened_urls.map(function(b) {
         return Discourse.ScreenedUrl.create(b);
diff --git a/app/assets/javascripts/admin/routes/admin_site_contents_route.js b/app/assets/javascripts/admin/routes/admin_site_contents_route.js
index b5399eb830d..8a6d786ea8f 100644
--- a/app/assets/javascripts/admin/routes/admin_site_contents_route.js
+++ b/app/assets/javascripts/admin/routes/admin_site_contents_route.js
@@ -12,7 +12,7 @@ Discourse.AdminSiteContentsRoute = Discourse.Route.extend({
     return Discourse.SiteContentType.findAll();
   },
 
-  renderTemplate: function(controller, model) {
+  renderTemplate: function() {
     this.render('admin/templates/site_contents', {into: 'admin/templates/admin'});
     this.render('admin/templates/site_contents_empty', {into: 'admin/templates/site_contents'});
   },
diff --git a/app/assets/javascripts/admin/views/ace_editor_view.js b/app/assets/javascripts/admin/views/ace_editor_view.js
index 1fd1d707cf0..e25a49e421b 100644
--- a/app/assets/javascripts/admin/views/ace_editor_view.js
+++ b/app/assets/javascripts/admin/views/ace_editor_view.js
@@ -42,7 +42,7 @@ Discourse.AceEditorView = Discourse.View.extend({
       aceEditorView.editor.setTheme("ace/theme/chrome");
       aceEditorView.editor.setShowPrintMargin(false);
       aceEditorView.editor.getSession().setMode("ace/mode/" + (aceEditorView.get('mode')));
-      aceEditorView.editor.on("change", function(e) {
+      aceEditorView.editor.on("change", function() {
         aceEditorView.skipContentChangeEvent = true;
         aceEditorView.set('content', aceEditorView.editor.getSession().getValue());
         aceEditorView.skipContentChangeEvent = false;
diff --git a/app/assets/javascripts/discourse/controllers/edit_topic_auto_close_controller.js b/app/assets/javascripts/discourse/controllers/edit_topic_auto_close_controller.js
index 92391867fd6..4b5268b9dd5 100644
--- a/app/assets/javascripts/discourse/controllers/edit_topic_auto_close_controller.js
+++ b/app/assets/javascripts/discourse/controllers/edit_topic_auto_close_controller.js
@@ -48,7 +48,7 @@ Discourse.EditTopicAutoCloseController = Discourse.ObjectController.extend(Disco
       } else {
         bootbox.alert(I18n.t('composer.auto_close_error'), function() { self.send('showModal'); } );
       }
-    }, function (error) {
+    }, function () {
       bootbox.alert(I18n.t('composer.auto_close_error'), function() { self.send('showModal'); } );
     });
   }
diff --git a/app/assets/javascripts/discourse/controllers/list_topics_controller.js b/app/assets/javascripts/discourse/controllers/list_topics_controller.js
index 732924018d4..8f5d9b96a57 100644
--- a/app/assets/javascripts/discourse/controllers/list_topics_controller.js
+++ b/app/assets/javascripts/discourse/controllers/list_topics_controller.js
@@ -55,7 +55,7 @@ Discourse.ListTopicsController = Discourse.ObjectController.extend({
     },
 
     // Show newly inserted topics
-    showInserted: function(e) {
+    showInserted: function() {
       var tracker = Discourse.TopicTrackingState.current();
 
       // Move inserted into topics
diff --git a/app/assets/javascripts/discourse/controllers/login_controller.js b/app/assets/javascripts/discourse/controllers/login_controller.js
index f6e2f0dfc06..b64490f08fb 100644
--- a/app/assets/javascripts/discourse/controllers/login_controller.js
+++ b/app/assets/javascripts/discourse/controllers/login_controller.js
@@ -61,7 +61,7 @@ Discourse.LoginController = Discourse.Controller.extend(Discourse.ModalFunctiona
           $hidden_login_form.submit();
         }
 
-      }, function(result) {
+      }, function() {
         // Failed to login
         loginController.flash(I18n.t('login.error'), 'error');
         loginController.set('loggingIn', false);
diff --git a/app/assets/javascripts/discourse/dialects/dialect.js b/app/assets/javascripts/discourse/dialects/dialect.js
index f7c53f1a66a..0b877870ac6 100644
--- a/app/assets/javascripts/discourse/dialects/dialect.js
+++ b/app/assets/javascripts/discourse/dialects/dialect.js
@@ -183,7 +183,7 @@ Discourse.Dialect = {
     @param {Function} emitter A function that emits the JsonML for the replacement.
   **/
   inlineReplace: function(token, emitter) {
-    this.registerInline(token, function(text, match, prev) {
+    this.registerInline(token, function() {
       return [token.length, emitter.call(this, token)];
     });
   },
diff --git a/app/assets/javascripts/discourse/helpers/application_helpers.js b/app/assets/javascripts/discourse/helpers/application_helpers.js
index 9cb947fcfb6..90944c24397 100644
--- a/app/assets/javascripts/discourse/helpers/application_helpers.js
+++ b/app/assets/javascripts/discourse/helpers/application_helpers.js
@@ -5,8 +5,7 @@
   @for Handlebars
 **/
 Handlebars.registerHelper('breakUp', function(property, hint, options) {
-  var prop, result, tokens;
-  prop = Ember.Handlebars.get(this, property, options);
+  var prop = Ember.Handlebars.get(this, property, options);
   if (!prop) return "";
   hint = Ember.Handlebars.get(this, hint, options);
 
@@ -328,7 +327,7 @@ Handlebars.registerHelper('date', function(property, options) {
   @method customHTML
   @for Handlebars
 **/
-Handlebars.registerHelper('customHTML', function(property, options) {
+Handlebars.registerHelper('customHTML', function(property) {
   var html = PreloadStore.get("customHTML");
 
   if (html && html[property] && html[property].length) {
diff --git a/app/assets/javascripts/discourse/initializers/live_development.js b/app/assets/javascripts/discourse/initializers/live_development.js
index 6442597c2d6..c4f128c5850 100644
--- a/app/assets/javascripts/discourse/initializers/live_development.js
+++ b/app/assets/javascripts/discourse/initializers/live_development.js
@@ -31,7 +31,7 @@ Discourse.addInitializer(function() {
   // Observe file changes
   return Discourse.MessageBus.subscribe("/file-change", function(data) {
     Ember.TEMPLATES.empty = Handlebars.compile("<div></div>");
-    _.each(data,function(me,idx) {
+    _.each(data,function(me) {
 
       if (me === "refresh") {
         // Refresh if necessary
diff --git a/app/assets/javascripts/discourse/lib/autocomplete.js b/app/assets/javascripts/discourse/lib/autocomplete.js
index cec4757d860..f8148d0918c 100644
--- a/app/assets/javascripts/discourse/lib/autocomplete.js
+++ b/app/assets/javascripts/discourse/lib/autocomplete.js
@@ -141,7 +141,6 @@ $.fn.autocomplete = function(options) {
 
   if (isInput) {
     var width = this.width();
-    var height = this.height();
     wrap = this.wrap("<div class='ac-wrap clearfix" + (disabled ? " disabled": "") +  "'/>").parent();
     wrap.width(width);
     if(options.single) {
diff --git a/app/assets/javascripts/discourse/lib/caret_position.js b/app/assets/javascripts/discourse/lib/caret_position.js
index 4bdb9b316ab..8569d3b7660 100644
--- a/app/assets/javascripts/discourse/lib/caret_position.js
+++ b/app/assets/javascripts/discourse/lib/caret_position.js
@@ -32,7 +32,7 @@ $.fn.caretPosition = function(options) {
   span = $("#pos span");
   textarea = $(this);
 
-  getStyles = function(el, prop) {
+  getStyles = function(el) {
     if (el.currentStyle) {
       return el.currentStyle;
     } else {
diff --git a/app/assets/javascripts/discourse/lib/eyeline.js b/app/assets/javascripts/discourse/lib/eyeline.js
index 74ffd125c37..17c97673d1f 100644
--- a/app/assets/javascripts/discourse/lib/eyeline.js
+++ b/app/assets/javascripts/discourse/lib/eyeline.js
@@ -19,7 +19,6 @@ Discourse.Eyeline.prototype.update = function() {
   var docViewTop = $(window).scrollTop(),
       windowHeight = $(window).height(),
       docViewBottom = docViewTop + windowHeight,
-      documentHeight = $(document).height(),
       $elements = $(this.selector),
       atBottom = false,
       foundElement = false,
diff --git a/app/assets/javascripts/discourse/lib/formatter.js b/app/assets/javascripts/discourse/lib/formatter.js
index 0b239aab071..996cefcf448 100644
--- a/app/assets/javascripts/discourse/lib/formatter.js
+++ b/app/assets/javascripts/discourse/lib/formatter.js
@@ -151,7 +151,7 @@ Discourse.Formatter = (function(){
   };
 
 
-  relativeAgeTiny = function(date, options){
+  relativeAgeTiny = function(date){
     var format = "tiny";
     var distance = Math.round((new Date() - date) / 1000);
     var distanceInMinutes = Math.round(distance / 60.0);
@@ -226,7 +226,7 @@ Discourse.Formatter = (function(){
   };
 
   relativeAgeMedium = function(date, options){
-    var displayDate, fiveDaysAgo, oneMinuteAgo, fullReadable, leaveAgo, val;
+    var displayDate, fiveDaysAgo, oneMinuteAgo, fullReadable, leaveAgo;
     var wrapInSpan = options.wrapInSpan === false ? false : true;
 
     leaveAgo = options.leaveAgo;
diff --git a/app/assets/javascripts/discourse/lib/key_value_store.js b/app/assets/javascripts/discourse/lib/key_value_store.js
index f0bcfbb63f5..9808590a547 100644
--- a/app/assets/javascripts/discourse/lib/key_value_store.js
+++ b/app/assets/javascripts/discourse/lib/key_value_store.js
@@ -9,7 +9,7 @@ Discourse.KeyValueStore = {
   initialized: false,
   context: "",
 
-  init: function(ctx, messageBus) {
+  init: function(ctx) {
     this.initialized = true;
     this.context = ctx;
   },
diff --git a/app/assets/javascripts/discourse/lib/lightbox.js b/app/assets/javascripts/discourse/lib/lightbox.js
index e6e574244d1..bdef16a111e 100644
--- a/app/assets/javascripts/discourse/lib/lightbox.js
+++ b/app/assets/javascripts/discourse/lib/lightbox.js
@@ -15,8 +15,7 @@ Discourse.Lightbox = {
 
           callbacks: {
             open: function() {
-              var self = this,
-                  wrap = this.wrap,
+              var wrap = this.wrap,
                   img = this.currItem.img,
                   maxHeight = img.css("max-height");
 
diff --git a/app/assets/javascripts/discourse/lib/screen_track.js b/app/assets/javascripts/discourse/lib/screen_track.js
index 1627092e3db..7d472fb650d 100644
--- a/app/assets/javascripts/discourse/lib/screen_track.js
+++ b/app/assets/javascripts/discourse/lib/screen_track.js
@@ -84,7 +84,7 @@ Discourse.ScreenTrack = Ember.Object.extend({
     var newTimings = {},
         totalTimings = this.get('totalTimings');
 
-    _.each(this.get('timings'), function(timing,key) {
+    _.each(this.get('timings'), function(timing) {
       if (!totalTimings[timing.postNumber])
         totalTimings[timing.postNumber] = 0;
 
diff --git a/app/assets/javascripts/discourse/mixins/load_more.js b/app/assets/javascripts/discourse/mixins/load_more.js
index 2839f0c89c8..6466fb715d5 100644
--- a/app/assets/javascripts/discourse/mixins/load_more.js
+++ b/app/assets/javascripts/discourse/mixins/load_more.js
@@ -10,7 +10,7 @@
 **/
 Discourse.LoadMore = Em.Mixin.create(Ember.ViewTargetActionSupport, Discourse.Scrolling, {
 
-  scrolled: function(e) {
+  scrolled: function() {
     var eyeline = this.get('eyeline');
     if (eyeline) { eyeline.update(); }
   },
diff --git a/app/assets/javascripts/discourse/mixins/scrolling.js b/app/assets/javascripts/discourse/mixins/scrolling.js
index def3220df78..ff3f1b65620 100644
--- a/app/assets/javascripts/discourse/mixins/scrolling.js
+++ b/app/assets/javascripts/discourse/mixins/scrolling.js
@@ -20,7 +20,7 @@ Discourse.Scrolling = Em.Mixin.create({
     opts = opts || {debounce: 100};
 
     var self = this,
-        onScrollMethod = function(e) {
+        onScrollMethod = function() {
           return Em.run.scheduleOnce('afterRender', self, 'scrolled');
         };
 
diff --git a/app/assets/javascripts/discourse/models/category.js b/app/assets/javascripts/discourse/models/category.js
index fd517a64ece..fa289e3f514 100644
--- a/app/assets/javascripts/discourse/models/category.js
+++ b/app/assets/javascripts/discourse/models/category.js
@@ -51,7 +51,7 @@ Discourse.Category = Discourse.Model.extend({
     return this.get('topic_count') > Discourse.SiteSettings.category_featured_topics;
   }.property('topic_count'),
 
-  save: function(args) {
+  save: function() {
     var url = "/categories";
     if (this.get('id')) {
       url = "/categories/" + (this.get('id'));
@@ -81,7 +81,7 @@ Discourse.Category = Discourse.Model.extend({
     return rval;
   }.property("permissions"),
 
-  destroy: function(callback) {
+  destroy: function() {
     return Discourse.ajax("/categories/" + (this.get('slug') || this.get('id')), { type: 'DELETE' });
   },
 
diff --git a/app/assets/javascripts/discourse/models/composer.js b/app/assets/javascripts/discourse/models/composer.js
index e660ebf8bb3..b5f002501e2 100644
--- a/app/assets/javascripts/discourse/models/composer.js
+++ b/app/assets/javascripts/discourse/models/composer.js
@@ -420,7 +420,7 @@ Discourse.Composer = Discourse.Model.extend({
     this.set('composeState', CLOSED);
 
     return Ember.Deferred.promise(function(promise) {
-      post.save(function(savedPost) {
+      post.save(function() {
         composer.clearState();
       }, function(error) {
         var response = $.parseJSON(error.responseText);
@@ -486,8 +486,7 @@ Discourse.Composer = Discourse.Model.extend({
 
       composer.set('composeState', SAVING);
       createdPost.save(function(result) {
-        var addedPost = false,
-            saving = true;
+        var saving = true;
 
         createdPost.updateFromJson(result);
 
diff --git a/app/assets/javascripts/discourse/models/post.js b/app/assets/javascripts/discourse/models/post.js
index 521b076f850..948b088f610 100644
--- a/app/assets/javascripts/discourse/models/post.js
+++ b/app/assets/javascripts/discourse/models/post.js
@@ -91,8 +91,7 @@ Discourse.Post = Discourse.Model.extend({
   }.property('read', 'topic.last_read_post_number', 'bookmarked'),
 
   bookmarkedChanged: function() {
-    var post = this;
-    Discourse.ajax("/posts/" + (this.get('id')) + "/bookmark", {
+    Discourse.ajax("/posts/" + this.get('id') + "/bookmark", {
       type: 'PUT',
       data: {
         bookmarked: this.get('bookmarked') ? true : false
diff --git a/app/assets/javascripts/discourse/models/post_stream.js b/app/assets/javascripts/discourse/models/post_stream.js
index 1d5fd5fb5fa..b7fcc5cbd1e 100644
--- a/app/assets/javascripts/discourse/models/post_stream.js
+++ b/app/assets/javascripts/discourse/models/post_stream.js
@@ -306,9 +306,7 @@ Discourse.PostStream = Em.Object.extend({
   fillGapAfter: function(post, gap) {
     var postId = post.get('id'),
         stream = this.get('stream'),
-        idx = stream.indexOf(postId),
-        currentPosts = this.get('posts'),
-        self = this;
+        idx = stream.indexOf(postId);
 
     if (idx !== -1) {
       stream.pushObjects(gap);
@@ -674,8 +672,7 @@ Discourse.PostStream = Em.Object.extend({
 
     var url = "/t/" + this.get('topic.id') + "/posts.json",
         data = { post_ids: postIds },
-        postStream = this,
-        result = Em.A();
+        postStream = this;
 
     return Discourse.ajax(url, {data: data}).then(function(result) {
       var posts = Em.get(result, "post_stream.posts");
diff --git a/app/assets/javascripts/discourse/models/topic.js b/app/assets/javascripts/discourse/models/topic.js
index c34bfaee2a0..75994b92575 100644
--- a/app/assets/javascripts/discourse/models/topic.js
+++ b/app/assets/javascripts/discourse/models/topic.js
@@ -24,7 +24,7 @@ Discourse.Topic = Discourse.Model.extend({
     return a !== 'regular' && a !== 'private_message';
   }.property('archetype'),
 
-  convertArchetype: function(archetype) {
+  convertArchetype: function() {
     var a = this.get('archetype');
     if (a !== 'regular' && a !== 'private_message') {
       this.set('archetype', 'regular');
@@ -233,7 +233,7 @@ Discourse.Topic = Discourse.Model.extend({
   },
 
   // Recover this topic if deleted
-  recover: function(deleted_by) {
+  recover: function() {
     this.setProperties({
       deleted_at: null,
       deleted_by: null,
@@ -326,14 +326,13 @@ Discourse.Topic.reopenClass({
 
   // Load a topic, but accepts a set of filters
   find: function(topicId, opts) {
-    var data, promise, url;
-    url = Discourse.getURL("/t/") + topicId;
+    var url = Discourse.getURL("/t/") + topicId;
 
     if (opts.nearPost) {
       url += "/" + opts.nearPost;
     }
 
-    data = {};
+    var data = {};
     if (opts.postsAfter) {
       data.posts_after = opts.postsAfter;
     }
diff --git a/app/assets/javascripts/discourse/models/topic_details.js b/app/assets/javascripts/discourse/models/topic_details.js
index ac4356e4ab5..fe915dcd551 100644
--- a/app/assets/javascripts/discourse/models/topic_details.js
+++ b/app/assets/javascripts/discourse/models/topic_details.js
@@ -66,7 +66,7 @@ Discourse.TopicDetails = Discourse.Model.extend({
     Discourse.ajax("/t/" + this.get('topic.id') + "/remove-allowed-user", {
       type: 'PUT',
       data: { username: username }
-    }).then(function(res) {
+    }).then(function() {
       users.removeObject(users.findProperty('username', username));
     });
   }
diff --git a/app/assets/javascripts/discourse/models/topic_list.js b/app/assets/javascripts/discourse/models/topic_list.js
index 71aa5b7831c..9c762f2640d 100644
--- a/app/assets/javascripts/discourse/models/topic_list.js
+++ b/app/assets/javascripts/discourse/models/topic_list.js
@@ -169,8 +169,7 @@ Discourse.TopicList.reopenClass({
   topicsFrom: function(result) {
     // Stitch together our side loaded data
     var categories = Discourse.Category.list(),
-        users = this.extractByKey(result.users, Discourse.User),
-        topics = Em.A();
+        users = this.extractByKey(result.users, Discourse.User);
 
     return result.topic_list.topics.map(function (t) {
       t.category = categories.findBy('id', t.category_id);
diff --git a/app/assets/javascripts/discourse/routes/discourse_location.js b/app/assets/javascripts/discourse/routes/discourse_location.js
index b4e9042ad47..43c86ae73b4 100644
--- a/app/assets/javascripts/discourse/routes/discourse_location.js
+++ b/app/assets/javascripts/discourse/routes/discourse_location.js
@@ -216,7 +216,7 @@ Ember.DiscourseLocation = Ember.Object.extend({
     var guid = Ember.guidFor(this),
         self = this;
 
-    Ember.$(window).on('popstate.ember-location-'+guid, function(e) {
+    Ember.$(window).on('popstate.ember-location-'+guid, function() {
       // Ignore initial page load popstate event in Chrome
       if (!popstateFired) {
         popstateFired = true;
diff --git a/app/assets/javascripts/discourse/routes/discourse_route.js b/app/assets/javascripts/discourse/routes/discourse_route.js
index 18dd83bd798..4f3be7f703d 100644
--- a/app/assets/javascripts/discourse/routes/discourse_route.js
+++ b/app/assets/javascripts/discourse/routes/discourse_route.js
@@ -16,7 +16,7 @@ Discourse.Route = Em.Route.extend({
 
     @method activate
   **/
-  activate: function(router, context) {
+  activate: function() {
     this._super();
 
     // Close mini profiler
diff --git a/app/assets/javascripts/discourse/routes/user_topic_list_routes.js b/app/assets/javascripts/discourse/routes/user_topic_list_routes.js
index 99830a2a5e6..c89e1a444fd 100644
--- a/app/assets/javascripts/discourse/routes/user_topic_list_routes.js
+++ b/app/assets/javascripts/discourse/routes/user_topic_list_routes.js
@@ -10,7 +10,7 @@ Discourse.UserTopicListRoute = Discourse.Route.extend({
   }
 });
 
-function createPMRoute(viewName, path, type) {
+function createPMRoute(viewName, path) {
   return Discourse.UserTopicListRoute.extend({
     userActionType: Discourse.UserAction.TYPES.messages_received,
 
@@ -18,7 +18,7 @@ function createPMRoute(viewName, path, type) {
       return Discourse.TopicList.find('topics/' + path + '/' + this.modelFor('user').get('username_lower'));
     },
 
-    setupController: function(controller, model) {
+    setupController: function() {
       this._super.apply(this, arguments);
       this.controllerFor('user').setProperties({
         pmView: viewName,
diff --git a/app/assets/javascripts/discourse/views/buttons/clear_pin_button.js b/app/assets/javascripts/discourse/views/buttons/clear_pin_button.js
index 1b82a871ce0..8f26c569ee7 100644
--- a/app/assets/javascripts/discourse/views/buttons/clear_pin_button.js
+++ b/app/assets/javascripts/discourse/views/buttons/clear_pin_button.js
@@ -18,7 +18,7 @@ Discourse.ClearPinButton = Discourse.ButtonView.extend({
     return this.get('controller.pinned') ? null : 'hidden';
   }.property('controller.pinned'),
 
-  click: function(buffer) {
+  click: function() {
     this.get('controller').send('clearPin');
   },
 
diff --git a/app/assets/javascripts/discourse/views/buttons/dropdown_button_view.js b/app/assets/javascripts/discourse/views/buttons/dropdown_button_view.js
index ce0b918b776..0aa875663c6 100644
--- a/app/assets/javascripts/discourse/views/buttons/dropdown_button_view.js
+++ b/app/assets/javascripts/discourse/views/buttons/dropdown_button_view.js
@@ -10,7 +10,7 @@ Discourse.DropdownButtonView = Discourse.View.extend({
   classNameBindings: [':btn-group', 'hidden'],
   shouldRerender: Discourse.View.renderIfChanged('text', 'longDescription'),
 
-  didInsertElement: function(e) {
+  didInsertElement: function() {
     // If there's a click handler, call it
     if (this.clicked) {
       var dropDownButtonView = this;
@@ -22,7 +22,7 @@ Discourse.DropdownButtonView = Discourse.View.extend({
     }
   },
 
-  willDestroyElement: function(e) {
+  willDestroyElement: function() {
     this.$('ul li').off('click.dropdown-button');
   },
 
diff --git a/app/assets/javascripts/discourse/views/composer/composer_view.js b/app/assets/javascripts/discourse/views/composer/composer_view.js
index d3ed47ae4b6..8fe9829cd46 100644
--- a/app/assets/javascripts/discourse/views/composer/composer_view.js
+++ b/app/assets/javascripts/discourse/views/composer/composer_view.js
@@ -88,7 +88,7 @@ Discourse.ComposerView = Discourse.View.extend(Ember.Evented, {
     });
   }.observes('model.composeState'),
 
-  keyUp: function(e) {
+  keyUp: function() {
     var controller = this.get('controller');
     controller.checkReplyLength();
 
@@ -337,7 +337,7 @@ Discourse.ComposerView = Discourse.View.extend(Ember.Evented, {
     return result;
   },
 
-  childDidInsertElement: function(e) {
+  childDidInsertElement: function() {
     return this.initEditor();
   },
 
diff --git a/app/assets/javascripts/discourse/views/list/list_topics_view.js b/app/assets/javascripts/discourse/views/list/list_topics_view.js
index 74602e49d94..a0ab85d94a1 100644
--- a/app/assets/javascripts/discourse/views/list/list_topics_view.js
+++ b/app/assets/javascripts/discourse/views/list/list_topics_view.js
@@ -55,7 +55,7 @@ Discourse.ListTopicsView = Discourse.View.extend(Discourse.LoadMore, {
   },
 
   // When the topic list is scrolled
-  scrolled: function(e) {
+  scrolled: function() {
     this._super();
     this.saveScrollPosition();
   }
diff --git a/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js b/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js
index 9cf871ce1cc..54f8e8eb3a9 100644
--- a/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js
+++ b/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js
@@ -39,7 +39,7 @@ Discourse.AvatarSelectorView = Discourse.ModalBodyView.extend({
     });
 
     // when a file has been selected
-    $upload.on("fileuploadadd", function (e, data) {
+    $upload.on("fileuploadadd", function () {
       self.setProperties({
         uploading: true,
         imageIsNotASquare: false
@@ -81,7 +81,7 @@ Discourse.AvatarSelectorView = Discourse.ModalBodyView.extend({
     });
 
     // when the upload is done
-    $upload.on("fileuploadalways", function (e, data) {
+    $upload.on("fileuploadalways", function () {
       self.setProperties({ uploading: false, uploadProgress: 0 });
     });
   },
diff --git a/app/assets/javascripts/discourse/views/modal/create_account_view.js b/app/assets/javascripts/discourse/views/modal/create_account_view.js
index f7bedc879fb..7946c461382 100644
--- a/app/assets/javascripts/discourse/views/modal/create_account_view.js
+++ b/app/assets/javascripts/discourse/views/modal/create_account_view.js
@@ -11,7 +11,7 @@ Discourse.CreateAccountView = Discourse.ModalBodyView.extend({
   title: I18n.t('create_account.title'),
   classNames: ['create-account'],
 
-  didInsertElement: function(e) {
+  didInsertElement: function() {
 
     this._super();
 
diff --git a/app/assets/javascripts/discourse/views/modal/hide_modal_view.js b/app/assets/javascripts/discourse/views/modal/hide_modal_view.js
index 172751b24a4..f6a54a82b7d 100644
--- a/app/assets/javascripts/discourse/views/modal/hide_modal_view.js
+++ b/app/assets/javascripts/discourse/views/modal/hide_modal_view.js
@@ -9,7 +9,7 @@
 Discourse.HideModalView = Discourse.ModalBodyView.extend({
 
   // No rendering!
-  render: function(buffer) { },
+  render: function() { },
 
   didInsertElement: function() {
     $('#discourse-modal').modal('hide');
diff --git a/app/assets/javascripts/discourse/views/modal/login_view.js b/app/assets/javascripts/discourse/views/modal/login_view.js
index 058fda0ab6d..cf2bbb652d1 100644
--- a/app/assets/javascripts/discourse/views/modal/login_view.js
+++ b/app/assets/javascripts/discourse/views/modal/login_view.js
@@ -41,7 +41,7 @@ Discourse.LoginView = Discourse.ModalBodyView.extend({
     });
   },
 
-  didInsertElement: function(e) {
+  didInsertElement: function() {
 
     this._super();
 
diff --git a/app/assets/javascripts/discourse/views/popup_input_tip_view.js b/app/assets/javascripts/discourse/views/popup_input_tip_view.js
index c17467a9383..551d1cb97f6 100644
--- a/app/assets/javascripts/discourse/views/popup_input_tip_view.js
+++ b/app/assets/javascripts/discourse/views/popup_input_tip_view.js
@@ -17,7 +17,7 @@ Discourse.PopupInputTipView = Discourse.View.extend({
   bouncePixels: 6,
   bounceDelay: 100,
 
-  click: function(e) {
+  click: function() {
     this.set('shownAt', false);
   },
 
diff --git a/app/assets/javascripts/discourse/views/quote_button_view.js b/app/assets/javascripts/discourse/views/quote_button_view.js
index aa70ffdc981..ab13c1c249c 100644
--- a/app/assets/javascripts/discourse/views/quote_button_view.js
+++ b/app/assets/javascripts/discourse/views/quote_button_view.js
@@ -56,10 +56,10 @@ Discourse.QuoteButtonView = Discourse.View.extend({
         view.selectText(e.target, controller);
         view.set('isMouseDown', false);
       })
-      .on('touchstart.quote-button', function(e){
+      .on('touchstart.quote-button', function(){
         view.set('isTouchInProgress', true);
       })
-      .on('touchend.quote-button', function(e){
+      .on('touchend.quote-button', function(){
         view.set('isTouchInProgress', false);
       })
       .on('selectionchange', function() {
diff --git a/app/assets/javascripts/discourse/views/topic_view.js b/app/assets/javascripts/discourse/views/topic_view.js
index feffb23c081..3f173019b24 100644
--- a/app/assets/javascripts/discourse/views/topic_view.js
+++ b/app/assets/javascripts/discourse/views/topic_view.js
@@ -71,7 +71,7 @@ Discourse.TopicView = Discourse.View.extend(Discourse.Scrolling, {
     }
   }.observes('controller.enteredAt'),
 
-  didInsertElement: function(e) {
+  didInsertElement: function() {
     this.bindScrolling({name: 'topic-view'});
 
     var topicView = this;
diff --git a/app/assets/javascripts/pagedown_custom.js b/app/assets/javascripts/pagedown_custom.js
index eff6c090cf5..9c862739e99 100644
--- a/app/assets/javascripts/pagedown_custom.js
+++ b/app/assets/javascripts/pagedown_custom.js
@@ -1,5 +1,3 @@
-/*global Markdown:true*/
-
 window.PagedownCustom = {
   insertButtons: [
     {
diff --git a/config/jshint.yml b/config/jshint.yml
index 2b9bda7ac25..a54a2ab30a3 100644
--- a/config/jshint.yml
+++ b/config/jshint.yml
@@ -34,6 +34,7 @@ regexp:   false     # true if . and [^...] should not be allowed in RegExp liter
 safe:     false     # true if the safe subset rules are enforced (used by ADsafe)
 strict:   false     # true if the ES5 "use strict"; pragma is required
 undef:    true      # true if variables must be declared before used
+unused:   true
 white:    false     # true if strict whitespace rules apply (see also 'indent' option)
 eqnull:   false
 onecase:  true     # allow for one case switches, can be more elegant sometimes
diff --git a/test/javascripts/controllers/topic_controller_test.js b/test/javascripts/controllers/topic_controller_test.js
index 81370496cd4..c99a84dc3f6 100644
--- a/test/javascripts/controllers/topic_controller_test.js
+++ b/test/javascripts/controllers/topic_controller_test.js
@@ -92,8 +92,7 @@ test("Select Replies when present", function() {
       tc = testController(Discourse.TopicController, topic),
       p1 = Discourse.Post.create({id: 1, post_number: 1, reply_count: 1}),
       p2 = Discourse.Post.create({id: 2, post_number: 2}),
-      p3 = Discourse.Post.create({id: 2, post_number: 3, reply_to_post_number: 1}),
-      postStream = tc.get('postStream');
+      p3 = Discourse.Post.create({id: 2, post_number: 3, reply_to_post_number: 1});
 
   ok(!tc.postSelected(p3), "replies are not selected by default");
   tc.send('toggledSelectedPostReplies', p1);
diff --git a/test/javascripts/jshint_all.js.erb b/test/javascripts/jshint_all.js.erb
index 153a71649d9..8ac790cd647 100644
--- a/test/javascripts/jshint_all.js.erb
+++ b/test/javascripts/jshint_all.js.erb
@@ -150,6 +150,7 @@ var jsHintOpts = {
   "plusplus": false,
   "regexp": false,
   "undef": true,
+  "unused": true,
   "sub": true,
   "strict": false,
   "white": false,
diff --git a/test/javascripts/lib/bbcode_test.js b/test/javascripts/lib/bbcode_test.js
index 91bce2ac0d9..88160015477 100644
--- a/test/javascripts/lib/bbcode_test.js
+++ b/test/javascripts/lib/bbcode_test.js
@@ -1,4 +1,3 @@
-/*global md5:true */
 module("Discourse.BBCode");
 
 var format = function(input, expected, text) {
diff --git a/test/javascripts/lib/formatter_test.js b/test/javascripts/lib/formatter_test.js
index 2c65e4f41d1..531ea2280e6 100644
--- a/test/javascripts/lib/formatter_test.js
+++ b/test/javascripts/lib/formatter_test.js
@@ -28,10 +28,6 @@ var formatDays = function(days) {
   return formatHours(days * 24);
 };
 
-var formatMonths = function(months) {
-  return formatDays(months * 30);
-};
-
 var shortDate = function(days){
   return moment().subtract('days', days).format('D MMM');
 };
diff --git a/test/javascripts/lib/html_test.js b/test/javascripts/lib/html_test.js
index cc683407329..c0d2879d77b 100644
--- a/test/javascripts/lib/html_test.js
+++ b/test/javascripts/lib/html_test.js
@@ -1,7 +1,5 @@
 module("Discourse.HTML");
 
-var html = Discourse.HTML;
-
 test("categoryLink without a category", function() {
   blank(Discourse.HTML.categoryLink(), "it returns no HTML");
 });
diff --git a/test/javascripts/lib/markdown_test.js b/test/javascripts/lib/markdown_test.js
index 56348270a8a..4fb041e0e65 100644
--- a/test/javascripts/lib/markdown_test.js
+++ b/test/javascripts/lib/markdown_test.js
@@ -1,5 +1,3 @@
-/*global sanitizeHtml:true */
-
 module("Discourse.Markdown", {
   setup: function() {
     Discourse.SiteSettings.traditional_markdown_linebreaks = false;
@@ -173,7 +171,7 @@ test("Quotes", function() {
                 "handles quotes properly");
 
   cookedOptions("1[quote=\"bob, post:1\"]my quote[/quote]2",
-                { topicId: 2, lookupAvatar: function(name) { } },
+                { topicId: 2, lookupAvatar: function() { } },
                 "<p>1</p>\n\n<p><aside class=\"quote\" data-post=\"1\"><div class=\"title\"><div class=\"quote-controls\"></div>bob said:" +
                 "</div><blockquote><p>my quote</p></blockquote></aside></p>\n\n<p>2</p>",
                 "includes no avatar if none is found");
diff --git a/test/javascripts/mixins/selected_posts_count_test.js b/test/javascripts/mixins/selected_posts_count_test.js
index e448cff2427..d8ecc084e4a 100644
--- a/test/javascripts/mixins/selected_posts_count_test.js
+++ b/test/javascripts/mixins/selected_posts_count_test.js
@@ -1,6 +1,6 @@
 module("Discourse.SelectedPostsCount");
 
-var buildTestObj = function(params, topicParams) {
+var buildTestObj = function(params) {
   return Ember.Object.createWithMixins(Discourse.SelectedPostsCount, params || {});
 };
 
diff --git a/test/javascripts/models/composer_test.js b/test/javascripts/models/composer_test.js
index 292ace4ab98..56ada6026b6 100644
--- a/test/javascripts/models/composer_test.js
+++ b/test/javascripts/models/composer_test.js
@@ -1,7 +1,7 @@
 module("Discourse.Composer");
 
 test('replyLength', function() {
-  var replyLength = function(val, expectedLength, text) {
+  var replyLength = function(val, expectedLength) {
     var composer = Discourse.Composer.create({ reply: val });
     equal(composer.get('replyLength'), expectedLength);
   };
diff --git a/test/javascripts/models/post_stream_test.js b/test/javascripts/models/post_stream_test.js
index f6b1221d292..4fd3346f1df 100644
--- a/test/javascripts/models/post_stream_test.js
+++ b/test/javascripts/models/post_stream_test.js
@@ -227,7 +227,7 @@ test("storePost", function() {
 test("identity map", function() {
   var postStream = buildStream(1234);
   var p1 = postStream.appendPost(Discourse.Post.create({id: 1, post_number: 1}));
-  var p3 = postStream.appendPost(Discourse.Post.create({id: 3, post_number: 4}));
+  postStream.appendPost(Discourse.Post.create({id: 3, post_number: 4}));
 
   equal(postStream.findLoadedPost(1), p1, "it can return cached posts by id");
   blank(postStream.findLoadedPost(4), "it can't find uncached posts");
@@ -403,7 +403,7 @@ test("comitting and triggerNewPostInStream race condition", function() {
   var user = Discourse.User.create({username: 'eviltrout', name: 'eviltrout', id: 321});
   var stagedPost = Discourse.Post.create({ raw: 'hello world this is my new post' });
 
-  var result = postStream.stagePost(stagedPost, user);
+  postStream.stagePost(stagedPost, user);
   equal(postStream.get('filteredPostsCount'), 0, "it has no filteredPostsCount yet");
   stagedPost.set('id', 123);