mash: Disable ash_sysui; begin removal.

ash/mus/shelf_layout_impl.h

Index: ash/mus/shelf_layout_impl.h
diff --git a/ash/mus/shelf_layout_impl.h b/ash/mus/shelf_layout_impl.h
deleted file mode 100644
index 698525bbe8a95d408a8d84bf939dc26cd0b675b0..0000000000000000000000000000000000000000
--- a/ash/mus/shelf_layout_impl.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2015 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 ASH_MUS_SHELF_LAYOUT_IMPL_H_
-#define ASH_MUS_SHELF_LAYOUT_IMPL_H_
-
-#include "ash/public/interfaces/shelf_layout.mojom.h"
-#include "base/macros.h"
-
-namespace ash {
-namespace mus {
-
-class RootWindowController;
-
-// Implements the ShelfLayout mojo interface to listen for layout changes from
-// the system UI application.
-class ShelfLayoutImpl : public mojom::ShelfLayout {
- public:
-  ShelfLayoutImpl();
-  ~ShelfLayoutImpl() override;
-
-  void Initialize(RootWindowController* root_controller);
-
- private:
-  // Overridden from mojom::ShelfLayout:
-  void SetAlignment(mash::shelf::mojom::Alignment alignment) override;
-  void SetAutoHideBehavior(
-      mash::shelf::mojom::AutoHideBehavior auto_hide) override;
-
-  RootWindowController* root_controller_ = nullptr;
-
-  DISALLOW_COPY_AND_ASSIGN(ShelfLayoutImpl);
-};
-
-}  // namespace mus
-}  // namespace ash
-
-#endif  // ASH_MUS_SHELF_LAYOUT_IMPL_H_