Revert of Update SSL/malware/net error interstitial design

chrome/browser/resources/security_warnings/interstitial_v2_mobile.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.
-
-var mobileNav = false;
-
-/**
- * For small screen mobile the navigation buttons are moved
- * below the advanced text.
- */
-function onResize() {
-  var helpOuterBox = document.querySelector('#details');
-  var mainContent = document.querySelector('#main-content');
-  var mediaQuery = '(max-width: 420px) and (orientation: portrait),' +
-      '(max-width: 736px) and (max-height: 420px) and (orientation: landscape)';
-
-  mobileNav = window.matchMedia(mediaQuery).matches;
-
-  mainContent.classList.toggle('hidden', false);
-  helpOuterBox.classList.toggle('hidden', true);
-}
-
-function setupMobileNav() {
-  window.addEventListener('resize', onResize);
-  onResize();
-}
-
-document.addEventListener('DOMContentLoaded', setupMobileNav);