[MD settings] Remove old side nav code; remove extra toolbar

chrome/browser/resources/settings/settings_ui/settings_ui.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.
 
 /**
  * @fileoverview
  * 'settings-ui' implements the UI for the Settings page.
  *
  * Example:
  *
@@ skipping 10 matching lines @@
     prefs: Object,
 
     /** @type {?settings.DirectionDelegate} */
     directionDelegate: {
       observer: 'directionDelegateChanged_',
       type: Object,
     },
   },
 
   listeners: {
-    'sideNav.iron-select': 'onIronSelect_',
-    'paper-responsive-change': 'onPaperResponsiveChange_',
-  },
-
-  /**
-   * @param {!CustomEvent} e
-   * @private
-   */
-  onIronSelect_: function(e) {
-    if (Polymer.dom(e).path.indexOf(this.$.panel) >= 0) {
-      this.classList.remove('narrowing');
-      this.$.panel.closeDrawer();
-    }
-  },
-
-  /**
-   * @param {!CustomEvent} e
-   * @private
-   */
-  onPaperResponsiveChange_: function(e) {
-    if (Polymer.dom(e).rootTarget == this.$.panel)
-      this.classList.toggle('narrowing', e.detail.narrow);
+    'sideNav.iron-activate': 'onIronActivate_',
   },
 
   /** @private */
+  onIronActivate_: function() {
+    this.$.panel.closeDrawer();
+  },
+
+  /** @private */
   directionDelegateChanged_: function() {
     this.$.panel.rightDrawer = this.directionDelegate.isRtl();
   },
 });