Remove xdisplaycheck

tools/mb/mb.py

 #!/usr/bin/env python
 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 """MB - the Meta-Build wrapper around GYP and GN
@@ skipping 1088 matching lines @@
     else:
       extra_files = ['../../testing/test_env.py']
 
       # This needs to mirror the settings in //build/config/ui.gni:
       # use_x11 = is_linux && !use_ozone.
       use_x11 = is_linux and not 'use_ozone=true' in vals['gn_args']
 
       xvfb = use_x11 and test_type == 'windowed_test_launcher'
       if xvfb:
         extra_files += [
-            'xdisplaycheck',
             '../../testing/xvfb.py',
         ]
 
       # Memcheck is only supported for linux. Ignore in other platforms.
       memcheck = is_linux and 'rtc_use_memcheck=true' in vals['gn_args']
       memcheck_cmdline = [
           'bash',
           '../../tools/valgrind-webrtc/webrtc_tests.sh',
           '--tool',
           'memcheck',
@@ skipping 443 matching lines @@
   # Then check to see if the arg contains any metacharacters other than
   # double quotes; if it does, quote everything (including the double
   # quotes) for safety.
   if any(a in UNSAFE_FOR_CMD for a in arg):
     arg = ''.join('^' + a if a in ALL_META_CHARS else a for a in arg)
   return arg
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))