Remove retail mode.

chrome/browser/resources/chromeos/login/demo_user_login.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.
-
-/**
- * @fileoverview Demo login UI.
- */
-
-/**
- * Handles a user clicking anywhere on the screen. This will log the demo user
- * in. Yes, this actually _is the intention.
- * @param {Event} e The click event that triggered this function.
- */
-onClick = function(e) {
-  document.removeEventListener('click', onClick);
-  e.stopPropagation();
-  showLoginSpinner();
-  chrome.send('launchDemoUser');
-};
-
-/**
- * Initializes the click handler.
- */
-initialize = function() {
-  $('page').style.opacity = 1;
-  document.addEventListener('click', onClick);
-  // Report back sign in UI being painted.
-  window.requestAnimationFrame(function() {
-    chrome.send('loginVisible', ['demo']);
-  });
-};
-
-/**
- * Show the login spinner.
- */
-showLoginSpinner = function() {
-  // We're already logging in - don't login on click.
-  document.removeEventListener('click', onClick);
-
-  // Hide the "Click to start" and show the spinner.
-  $('demo-login-text').hidden = true;
-  $('login-spinner').hidden = false;
-};
-
-disableTextSelectAndDrag();
-document.addEventListener('DOMContentLoaded', initialize);