Revert "MD user manager (learn more page, user manager tutorial)"

chrome/browser/resources/md_user_manager/user_manager.js

 // Copyright 2016 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.
 
 <include src="../../../../ui/login/screen.js">
 <include src="../../../../ui/login/bubble.js">
 <include src="../../../../ui/login/login_ui_tools.js">
 <include src="../../../../ui/login/display_manager.js">
 <include src="../../../../ui/login/account_picker/screen_account_picker.js">
 <include src="../../../../ui/login/account_picker/user_pod_row.js">
@@ skipping 39 matching lines @@
                                           data: {disableAddUser: false}});
     // Hide control options if the user does not have the right permissions.
     var controlBar = document.querySelector('control-bar');
     controlBar.showGuest = showGuest;
     controlBar.showAddPerson = showAddPerson;
 
     // Disable the context menu, as the Print/Inspect element items don't
     // make sense when displayed as a widget.
     document.addEventListener('contextmenu', function(e) {e.preventDefault();});
 
-    if (window.location.hash == '#tutorial')
-      document.querySelector('user-manager-tutorial').startTutorial();
+    // TODO(mahmadi): start the tutorial if the location hash is #tutorial.
   };
 
   /**
    * Open a new browser for the given profile.
    * @param {string} profilePath The profile's path.
    */
   UserManager.launchUser = function(profilePath) {
     signin.ProfileBrowserProxyImpl.getInstance().launchUser(profilePath);
   };
 
@@ skipping 42 matching lines @@
 // Allow selection events on components with editable text (password field)
 // bug (http://code.google.com/p/chromium/issues/detail?id=125863)
 disableTextSelectAndDrag(function(e) {
   var src = e.target;
   return src instanceof HTMLTextAreaElement ||
          src instanceof HTMLInputElement &&
          /text|password|search/.test(src.type);
 });
 
 document.addEventListener('DOMContentLoaded', cr.ui.UserManager.initialize);