remove unused feature controller

core/client/app/controllers/feature.js

@@ -1,37 +0,0 @@
-import Ember from 'ember';
-
-const {Controller, PromiseProxyMixin, computed} = Ember;
-const {alias} = computed;
-
-export default Controller.extend(PromiseProxyMixin, {
-
-    setting: alias('content'),
-
-    labs: computed('isSettled', 'setting.labs', function () {
-        let value = {};
-
-        if (this.get('isFulfilled')) {
-            try {
-                value = JSON.parse(this.get('setting.labs') || {});
-            } catch (err) {
-                value = {};
-            }
-        }
-
-        return value;
-    }),
-
-    publicAPI: computed('config.publicAPI', 'labs.publicAPI', function () {
-        return this.get('config.publicAPI') || this.get('labs.publicAPI');
-    }),
-
-    init() {
-        this._super(...arguments);
-
-        let promise = this.store.query('setting', {type: 'blog,theme'}).then((settings) => {
-            return settings.get('firstObject');
-        });
-
-        this.set('promise', promise);
-    }
-});