Revert of Show ancestor hierarchy in accessibility panel

third_party/WebKit/Source/devtools/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 devtools_embedder_scripts = [
   "front_end/devtools.js",
   "front_end/Tests.js",
@@ skipping 328 matching lines @@
 # Lazy-loaded modules.
 devtools_accessibility_js_files = [
   "front_end/accessibility/accessibilityNode.css",
   "front_end/accessibility/AccessibilityModel.js",
   "front_end/accessibility/AccessibilitySidebarView.js",
   "front_end/accessibility/AccessibilityNodeView.js",
   "front_end/accessibility/AccessibilityStrings.js",
   "front_end/accessibility/ARIAAttributesView.js",
   "front_end/accessibility/ARIAConfig.js",
   "front_end/accessibility/ARIAMetadata.js",
-  "front_end/accessibility/AXTreePane.js",
 ]
 devtools_animation_js_files = [
   "front_end/animation/animationScreenshotPopover.css",
   "front_end/animation/animationTimeline.css",
   "front_end/animation/AnimationGroupPreviewUI.js",
   "front_end/animation/AnimationModel.js",
   "front_end/animation/AnimationScreenshotPopover.js",
   "front_end/animation/AnimationTimeline.js",
   "front_end/animation/AnimationUI.js",
 ]
@@ skipping 801 matching lines @@
     ]
   }
 
   copy("copy_emulated_devices_images_debug") {
     sources = devtools_emulated_devices_images
     outputs = [
       "$resources_out_debug_dir/emulated_devices/{{source_file_part}}",
     ]
   }
 }