Remove enable_topchrome_md build flag

chrome/tools/build/chromeos/FILES.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # 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.
 
 # This is a buildbot configuration file containing a tagged list of files
 # processed by the stage/archive scripts. The known tags are:
 #
@@ skipping 23 matching lines @@
   },
   {
     'filename': 'chrome_100_percent.pak',
     'buildtype': ['dev', 'official'],
   },
   {
     'filename': 'chrome_200_percent.pak',
     'buildtype': ['dev', 'official'],
   },
   {
-    'filename': 'chrome_material_100_percent.pak',
-    'buildtype': ['dev', 'official'],
-  },
-  {
-    'filename': 'chrome_material_200_percent.pak',
-    'buildtype': ['dev', 'official'],
-  },
-  {
     'filename': 'chrome_sandbox',
     'buildtype': ['dev', 'official'],
   },
   {
     'filename': 'chrome.1',
     'buildtype': ['dev', 'official'],
   },
   {
     'filename': 'emit_login_prompt_ready',
     'buildtype': ['dev'],
@@ skipping 75 matching lines @@
   },
   {
     'filename': 'nacl_helper_bootstrap',
     'buildtype': ['dev', 'official'],
   },
   {
     'filename': 'nacl_helper_nonsfi',
     'buildtype': ['dev', 'official'],
   },
 ]