Remove dbus-launch workaround now that it's been propagated to runtest.py.

content/test/gpu/run_gpu_test

 #!/usr/bin/env python
 # Copyright (c) 2013 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 os
 import sys
 
-def _DoDBusWorkaround():
-  # Attempt to work around bug in GLib by getting DBus session bus
-  # address early. crbug.com/309093
-  import platform
-  import re
-  import subprocess
-  if (platform.uname()[0].lower() == 'linux' and
-      'DBUS_SESSION_BUS_ADDRESS' not in os.environ):
-    try:
-      dbus_output = subprocess.check_output(['dbus-launch']).split('\n')
-      for line in dbus_output:
-        m = re.match(r"([^=]+)\=(.+)", line)
-        if m:
-          os.environ[m.group(1)] = m.group(2)
-    except:
-      pass
-
 sys.path.append(os.path.join(os.path.dirname(__file__),
     os.pardir, os.pardir, os.pardir, 'tools', 'telemetry'))
 
 from telemetry import test_runner
 
 if __name__ == '__main__':
-  _DoDBusWorkaround()
   sys.exit(test_runner.Main())