Move EE differences for `app/assets/javascripts/gfm_auto_complete.js`

Move EE differences for app/assets/javascripts/gfm_auto_complete.js

Differences

--- gitlab/app/assets/javascripts/gfm_auto_complete.js
+++ gitlab/app/assets/javascripts/gfm_auto_complete.js
@@ -1,6 +1,7 @@
 import $ from 'jquery';
 import 'at.js';
 import _ from 'underscore';
+
 import glRegexp from './lib/utils/regexp';
 import AjaxCache from './lib/utils/ajax_cache';