Removes some dead code and includes

ash/mus/bridge/wm_window_mus.cc

 // 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.
 
 #include "ash/mus/bridge/wm_window_mus.h"
 
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/wm/container_finder.h"
 #include "ash/common/wm/window_positioning_utils.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_layout_manager.h"
 #include "ash/common/wm_lookup.h"
 #include "ash/common/wm_transient_window_observer.h"
 #include "ash/common/wm_window_observer.h"
 #include "ash/common/wm_window_property.h"
-#include "ash/mus/bridge/mus_layout_manager_adapter.h"
 #include "ash/mus/bridge/wm_root_window_controller_mus.h"
 #include "ash/mus/bridge/wm_shell_mus.h"
 #include "ash/mus/property_util.h"
 #include "ash/mus/window_manager.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/wm/window_properties.h"
 #include "services/ui/public/interfaces/window_manager.mojom.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/mus/window_manager_delegate.h"
 #include "ui/aura/mus/window_mus.h"
@@ skipping 238 matching lines @@
 }
 
 void WmWindowMus::AddLimitedPreTargetHandler(ui::EventHandler* handler) {
   DCHECK(WmShellMus::Get()->window_tree_client()->WasCreatedByThisClient(
       aura::WindowMus::Get(aura_window())));
   WmWindowAura::AddLimitedPreTargetHandler(handler);
 }
 
 }  // namespace mus
 }  // namespace ash