Settings Router Refactor: Kill settings-router.

chrome/browser/resources/settings/site_settings/all_sites.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.
 
 /**
  * @fileoverview
  * 'all-sites' is the polymer element for showing the list of all sites under
  * Site Settings.
  */
 Polymer({
   is: 'all-sites',
 
   behaviors: [SiteSettingsBehavior],
 
   properties: {
     /**
-     * The current active route.
-     */
-    currentRoute: {
-      type: Object,
-      notify: true,
-    },
-
-    /**
      * The site that was selected by the user in the dropdown list.
      * @type {SiteException}
      */
     selectedSite: {
       type: Object,
       notify: true,
     },
   },
 });