[android] Remove pylib/{remote,uirobot}.

build/android/pylib/base/environment_factory.py

 # 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.
 
 from pylib import constants
 from pylib.local.device import local_device_environment
-try:
-  from pylib.remote.device import remote_device_environment
-except ImportError:
-  remote_device_environment = None
 
 def CreateEnvironment(args, error_func):
 
   if args.environment == 'local':
     if args.command not in constants.LOCAL_MACHINE_TESTS:
       return local_device_environment.LocalDeviceEnvironment(args, error_func)
     # TODO(jbudorick) Add local machine environment.
-  if args.environment == 'remote_device' and remote_device_environment:
-    return remote_device_environment.RemoteDeviceEnvironment(args,
-                                                             error_func)
+
   error_func('Unable to create %s environment.' % args.environment)