Remove scroll helper... not being used anymore.

app/assets/javascripts/dispatcher.js

@@ -68,7 +68,6 @@ import VersionCheckImage from './version_check_image';
 import Wikis from './wikis';
 import ZenMode from './zen_mode';
 import initSettingsPanels from './settings_panels';
-import ScrollHelper from './helpers/scroll_helper';
 import initExperimentalFlags from './experimental_flags';
 import OAuthRememberMe from './oauth_remember_me';
 import PerformanceBar from './performance_bar';
@@ -99,8 +98,6 @@ import UserFeatureHelper from './helpers/user_feature_helper';
         return false;
       }
-      ScrollHelper.setScrollWidth();
-
       path = page.split(':');
       shortcut_handler = null;

app/assets/javascripts/helpers/scroll_helper.js

-import $ from 'jquery';
-
-const ScrollHelper = {
-  getScrollWidth() {
-    const $rulerContainer = $('<div>').css({
-      visibility: 'hidden',
-      width: 100,
-      overflow: 'scroll',
-    });
-
-    const $ruler = $('<div>').css({
-      width: 100,
-    });
-
-    $ruler.appendTo($rulerContainer);
-
-    $rulerContainer.appendTo('body');
-
-    const scrollWidth = $ruler.get(0).offsetWidth;
-
-    $rulerContainer.remove();
-
-    return 100 - scrollWidth;
-  },
-
-  setScrollWidth() {
-    $('body').attr('data-scroll-width', ScrollHelper.getScrollWidth());
-  },
-};
-
-export default ScrollHelper;