dbus: Remove unused GMock-ed clients.

chromeos/dbus/mock_sms_client.h

-// 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.
-
-#ifndef CHROMEOS_DBUS_MOCK_SMS_CLIENT_H_
-#define CHROMEOS_DBUS_MOCK_SMS_CLIENT_H_
-
-#include <string>
-
-#include "base/values.h"
-#include "chromeos/dbus/sms_client.h"
-#include "dbus/object_path.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace chromeos {
-
-class MockSMSClient : public SMSClient {
- public:
-  MockSMSClient();
-  virtual ~MockSMSClient();
-  MOCK_METHOD3(GetAll, void(const std::string& service_name,
-                            const dbus::ObjectPath& object_path,
-                            const GetAllCallback& callback));
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_DBUS_MOCK_SMS_CLIENT_H_