UX: Remove drag and drop reordering of categories. It was not working

perfectly and you can re-order using the modal number.

app/assets/javascripts/discourse/controllers/discovery/categories.js.es6

@@ -5,10 +5,6 @@ export default Discourse.DiscoveryController.extend({
   showPostsColumn: Em.computed.empty('withLogo'),
 
   actions: {
-    toggleOrdering: function(){
-      this.set("ordering",!this.get("ordering"));
-    },
-
     refresh: function() {
       var self = this;
 
@@ -27,13 +23,6 @@ export default Discourse.DiscoveryController.extend({
     return Discourse.User.currentProp('staff');
   }.property(),
 
-  fixedCategoryPositions: Discourse.computed.setting('fixed_category_positions'),
-  canOrder: Em.computed.and('fixedCategoryPositions', 'canEdit'),
-
-  moveCategory: function(categoryId, position){
-    this.get('model.categories').moveCategory(categoryId, position);
-  },
-
   latestTopicOnly: function() {
     return this.get('categories').find(function(c) { return c.get('featuredTopics.length') > 1; }) === undefined;
   }.property('categories.@each.featuredTopics.length')

app/assets/javascripts/discourse/models/category_list.js

@@ -10,13 +10,6 @@ Discourse.CategoryList = Ember.ArrayProxy.extend({
   init: function() {
     this.content = [];
     this._super();
-  },
-
-  moveCategory: function(categoryId, position){
-    Discourse.ajax("/category/" + categoryId + "/move", {
-      type: 'POST',
-      data: { position: position }
-    });
   }
 });
 

app/assets/javascripts/discourse/templates/discovery/categories.js.handlebars

@@ -7,9 +7,7 @@
           <th class='latest'>{{i18n categories.latest}}</th>
           <th class='stats topics'>{{i18n categories.topics}}</th>
           {{#if showPostsColumn}}
-          <th class='stats posts'>{{i18n categories.posts}}
-            {{#if canOrder}}<button title='{{i18n categories.toggle_ordering}}' class='btn toggle-admin no-text' {{action toggleOrdering}}><i class='fa fa-wrench'></i></button>{{/if}}
-          </th>
+          <th class='stats posts'>{{i18n categories.posts}}</th>
           {{/if}}
         </tr>
       </thead>
@@ -19,7 +17,6 @@
           <td class='category' style="border-color: #{{unbound color}}">
             <div>
               <div class="pull-left">
-                {{#if controller.ordering}}<i class="fa fa-bars"></i>{{/if}}
                 {{category-title-link category=this}}
                 {{#if unreadTopics}}
                   <a href={{unbound unreadUrl}} class='badge new-posts badge-notification' title='{{i18n topic.unread_topics count="unreadTopics"}}'>{{i18n filters.unread.lower_title_with_count count="unreadTopics"}}</a>

app/assets/javascripts/discourse/views/discovery-categories.js.es6

@@ -1,43 +1,3 @@
 import UrlRefresh from 'discourse/mixins/url-refresh';
 
-export default Discourse.View.extend(UrlRefresh, {
-
-  orderingChanged: function(){
-    if (this.get("controller.ordering")) {
-      this.enableOrdering();
-    } else {
-      this.disableOrdering();
-    }
-  }.observes("controller.ordering"),
-
-  rows: function() {
-    return $('.topic-list tbody');
-  },
-
-  enableOrdering: function(){
-    var self = this;
-    Em.run.next(function(){
-      self.rows().sortable({handle: '.fa-bars'}).on('sortupdate',function(evt, data){
-        var tr = $(data.item);
-        var categoryId = tr.data('category_id');
-        var position = self.rows().find('tr').index(tr[0]);
-        self.get('controller').moveCategory(categoryId, position);
-      });
-    });
-  },
-
-  _scrollTop: function() {
-    Em.run.schedule('afterRender', function() {
-      $(document).scrollTop(0);
-    });
-  }.on('didInsertElement'),
-
-  disableOrdering: function(){
-    this.rows().sortable("destroy").off('sortupdate');
-  },
-
-  willDestroyElement: function(){
-    this.disableOrdering();
-  }
-
-});
+export default Discourse.View.extend(UrlRefresh, Discourse.ScrollTop);