Removes code using mus client lib

ui/views/mus/views_mus_test_suite.h

-// Copyright 2016 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 UI_VIEWS_MUS_VIEWS_MUS_TEST_SUITE_H_
-#define UI_VIEWS_MUS_VIEWS_MUS_TEST_SUITE_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "ui/views/views_test_suite.h"
-
-namespace views {
-
-class ServiceManagerConnection;
-
-class ViewsMusTestSuite : public ViewsTestSuite {
- public:
-  ViewsMusTestSuite(int argc, char** argv);
-  ~ViewsMusTestSuite() override;
-
- private:
-  // ViewsTestSuite:
-  void Initialize() override;
-  void Shutdown() override;
-
-  std::unique_ptr<ServiceManagerConnection> service_manager_connections_;
-
-  DISALLOW_COPY_AND_ASSIGN(ViewsMusTestSuite);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_MUS_VIEWS_MUS_TEST_SUITE_H_