Revert "ES6: Half a dozen more controllers converted"

This reverts commit bc2d87e5c1b35bd49e62db944d00cf960b16abd9.

app/assets/javascripts/discourse/controllers/change-owner.js.es6

@@ -1,57 +0,0 @@
-/**
-  Modal related to changing the ownership of posts
-
-  @class ChangeOwnerController
-  @extends Discourse.ObjectController
-  @namespace Discourse
-  @uses Discourse.ModalFunctionality
-  @module Discourse
- **/
-export default Discourse.ObjectController.extend(Discourse.SelectedPostsCount, Discourse.ModalFunctionality, {
-  needs: ['topic'],
-
-  topicController: Em.computed.alias('controllers.topic'),
-  selectedPosts: Em.computed.alias('topicController.selectedPosts'),
-
-  buttonDisabled: function() {
-    if (this.get('saving')) return true;
-    return this.blank('new_user');
-  }.property('saving', 'new_user'),
-
-  buttonTitle: function() {
-    if (this.get('saving')) return I18n.t('saving');
-    return I18n.t('topic.change_owner.action');
-  }.property('saving'),
-
-  onShow: function() {
-    this.setProperties({
-      saving: false,
-      new_user: ''
-    });
-  },
-
-  actions: {
-    changeOwnershipOfPosts: function() {
-      this.set('saving', true);
-
-      var postIds = this.get('selectedPosts').map(function(p) { return p.get('id'); }),
-          self = this,
-          saveOpts = {
-            post_ids: postIds,
-            username: this.get('new_user')
-          };
-
-      Discourse.Topic.changeOwners(this.get('id'), saveOpts).then(function(result) {
-        // success
-        self.send('closeModal');
-        self.get('topicController').send('toggleMultiSelect');
-        Em.run.next(function() { Discourse.URL.routeTo(result.url); });
-      }, function() {
-        // failure
-        self.flash(I18n.t('topic.change_owner.error'), 'alert-error');
-        self.set('saving', false);
-      });
-      return false;
-    }
-  }
-});