Revert of Show ancestor hierarchy in accessibility panel

third_party/WebKit/Source/devtools/front_end/accessibility/accessibilityNode.css

 /*
  * 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.
  */
 
 .sidebar-pane.accessibility-computed {
     background-color: rgba(0, 0, 0, 0.03);
 }
 
@@ skipping 40 matching lines @@
 
 span.ax-internal-role {
     font-style: italic;
 }
 
 .ax-ignored-info {
     padding: 6px;
 }
 
 .ax-ignored-node-pane {
+    background-color: hsl(0, 0%, 96%);
     flex: none;
 }
 
-.ax-tree-ignored-node {
-    font-style: italic;
-}
-
 .tree-outline li {
     padding-left: 1px;
     align-items: baseline;
 }
 
 .tree-outline li.property {
     color: rgb(33, 33, 33);
 }
 
 .tree-outline li.invalid {
@@ skipping 27 matching lines @@
     margin-left: -11px;
 }
 
 .ax-value-string {
     color: rgb(200, 0, 0);
 }
 
 .sidebar-pane-stack .sidebar-pane {
     padding-left: 4px;
 }