Revert of Make ChromeVox Next the default ChromeVox experience

chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.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 The ChromeVox panel and menus.
  */
 
 goog.provide('Panel');
 
@@ skipping 675 matching lines @@
  * Close the tutorial.
  */
 Panel.onCloseTutorial = function() {
   $('main').style.display = 'block';
   $('tutorial').style.display = 'none';
   Panel.closeMenusAndRestoreFocus();
 };
 
 window.addEventListener('load', function() {
   Panel.init();
-
-  switch (location.search.slice(1)) {
-    case 'tutorial':
-      Panel.onTutorial();
-  }
 }, false);
 
 window.addEventListener('hashchange', function() {
   if (location.hash == '#fullscreen' || location.hash == '#focus') {
     this.originalStickyState_ = cvox.ChromeVox.isStickyPrefOn;
     cvox.ChromeVox.isStickyPrefOn = false;
   } else {
     cvox.ChromeVox.isStickyPrefOn = this.originalStickyState_;
   }
 }, false);