Remove chrome/ code to handle App Notifications

chrome/browser/resources/ntp4/apps_page.css

 /* 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. */
 
 .app {
   outline: none;
   position: absolute;
   text-align: center;
 }
 
@@ skipping 74 matching lines @@
 }
 
 .app-context-menu > [checked]::before {
   height: 5px;
 }
 
 .launch-click-target {
   cursor: pointer;
 }
 
-/* Notifications */
-
-.app-notification {
-  -webkit-transition: color 150ms linear;
-  color: #999;
-  display: block;
-  font-size: 0.9em;
-  white-space: nowrap;
-}
-
-.app-notification:hover {
-  text-decoration: underline;
-}
-
 .app-img-container > img:first-child {
   display: block;
 }
 
 .app .invisible {
   visibility: hidden;
 }
-
-/* Move the notification lower on apps pages to account for the 16px of
- * transparency each app icon should have. */
-.apps-page #notification-container {
-  bottom: 15px;
-}