Remove unncessary CP

app/assets/javascripts/discourse/controllers/user-private-messages.js.es6

@@ -2,7 +2,6 @@ import computed from 'ember-addons/ember-computed-decorators';
 import Topic from 'discourse/models/topic';
 
 export default Ember.Controller.extend({
-
   needs: ["application", "user-topics-list", "user"],
   pmView: false,
   viewingSelf: Em.computed.alias('controllers.user.viewingSelf'),
@@ -11,10 +10,6 @@ export default Ember.Controller.extend({
   selected: Em.computed.alias('controllers.user-topics-list.selected'),
   bulkSelectEnabled: Em.computed.alias('controllers.user-topics-list.bulkSelectEnabled'),
 
-  mobileView: function() {
-    return this.site.mobileView;
-  }.property(),
-
   showNewPM: function(){
     return this.get('controllers.user.viewingSelf') &&
            Discourse.User.currentProp('can_send_private_messages');

app/assets/javascripts/discourse/templates/user/messages.hbs

@@ -1,8 +1,8 @@
 <section class='user-navigation'>
-  {{#unless mobileView}}
-  {{#if showNewPM}}
-  {{d-button class="btn-primary new-private-message" action="composePrivateMessage" icon="envelope" label="user.new_private_message"}}
-  {{/if}}
+  {{#unless site.mobileView}}
+    {{#if showNewPM}}
+      {{d-button class="btn-primary new-private-message" action="composePrivateMessage" icon="envelope" label="user.new_private_message"}}
+    {{/if}}
   {{/unless}}
 
   {{#mobile-nav class='messages-nav' desktopClass='nav-stacked action-list' currentPath=currentPath}}
@@ -47,10 +47,10 @@
       <i class="fa fa-list"></i>
     </button>
 
-    {{#if mobileView}}
-    {{#if showNewPM}}
-    {{d-button class="btn-primary new-private-message" action="composePrivateMessage" icon="envelope" label="user.new_private_message"}}
-    {{/if}}
+    {{#if site.mobileView}}
+      {{#if showNewPM}}
+        {{d-button class="btn-primary new-private-message" action="composePrivateMessage" icon="envelope" label="user.new_private_message"}}
+      {{/if}}
     {{/if}}
 
     {{#if canArchive}}