MD Settings: remove an import and some variables from early loading shim

chrome/browser/resources/settings/settings_ui/settings_ui.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview
  * 'settings-ui' implements the UI for the Settings page.
  *
  * Example:
  *
@@ skipping 147 matching lines @@
 
     this.showAndroidApps_ = loadTimeData.valueExists('androidAppsAllowed') &&
         loadTimeData.getBoolean('androidAppsAllowed');
   },
 
   /** @private {?IntersectionObserver} */
   intersectionObserver_: null,
 
   /** @override */
   attached: function() {
+    document.documentElement.classList.remove('loading');
+
     setTimeout(function() {
       chrome.send(
           'metricsHandler:recordTime',
           ['Settings.TimeUntilInteractive', window.performance.now()]);
     });
+
     // Preload bold Roboto so it doesn't load and flicker the first time used.
     document.fonts.load('bold 12px Roboto');
     settings.setGlobalScrollTarget(this.$.container);
 
     // Setup drop shadow logic.
     var callback = function(entries) {
       assert(entries.length == 1);
       this.$.dropShadow.classList.toggle(
           'has-shadow', entries[0].intersectionRatio == 0);
     }.bind(this);
@@ skipping 79 matching lines @@
   onMenuButtonTap_: function() {
     this.$.drawer.toggle();
   },
 
   /** @private */
   directionDelegateChanged_: function() {
     this.$.drawer.align = this.directionDelegate.isRtl() ?
         'right' : 'left';
   },
 });