Eliminate use of sim unlock UI notifications

chrome/browser/resources/chromeos/sim_unlock.js

 // Copyright (c) 2012 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.
 
 cr.define('mobile', function() {
 
   function SimUnlock() {
   }
 
   cr.addSingletonGetter(SimUnlock);
@@ skipping 189 matching lines @@
       $('new-pin-input').focus();
       this.updateDialogSize_(0, 18);
     },
 
     updateSimStatus_: function(simInfo) {
       this.changeState_(simInfo);
     },
   };
 
   SimUnlock.cancel = function() {
-    chrome.send('cancel');
     SimUnlock.close();
   };
 
   SimUnlock.close = function() {
     window.close();
   };
 
   SimUnlock.initialize = function() {
     this.initialized_ = true;
 
@@ skipping 204 matching lines @@
   };
 
   // Export
   return {
     SimUnlock: SimUnlock
   };
 
 });
 
 disableTextSelectAndDrag();