Ozone: Remove the caca platform from the tree

ui/ozone/platform/caca/scoped_caca_types.h

-// 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.
-
-#ifndef UI_OZONE_PLATFORM_CACA_SCOPED_CACA_TYPES_H_
-#define UI_OZONE_PLATFORM_CACA_SCOPED_CACA_TYPES_H_
-
-#include <memory>
-
-typedef struct caca_canvas caca_canvas_t;
-typedef struct caca_dither caca_dither_t;
-typedef struct caca_display caca_display_t;
-
-namespace ui {
-
-struct CacaCanvasDeleter {
-  void operator()(caca_canvas_t* canvas) const;
-};
-
-struct CacaDisplayDeleter {
-  void operator()(caca_display_t* display) const;
-};
-
-struct CacaDitherDeleter {
-  void operator()(caca_dither_t* dither) const;
-};
-
-typedef std::unique_ptr<caca_canvas_t, CacaCanvasDeleter> ScopedCacaCanvas;
-typedef std::unique_ptr<caca_display_t, CacaDisplayDeleter> ScopedCacaDisplay;
-typedef std::unique_ptr<caca_dither_t, CacaDitherDeleter> ScopedCacaDither;
-
-}  // namespace ui
-
-#endif  // UI_OZONE_PLATFORM_CACA_SCOPED_CACA_TYPES_H_