Ozone: Remove the caca platform from the tree

ui/ozone/platform/caca/scoped_caca_types.cc

-// 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.
-
-#include "ui/ozone/platform/caca/scoped_caca_types.h"
-
-#include <caca.h>
-
-namespace ui {
-
-void CacaCanvasDeleter::operator()(caca_canvas_t* canvas) const {
-  caca_free_canvas(canvas);
-}
-
-void CacaDisplayDeleter::operator()(caca_display_t* display) const {
-  caca_free_display(display);
-}
-
-void CacaDitherDeleter::operator()(caca_dither_t* dither) const {
-  caca_free_dither(dither);
-}
-
-}  // namespace ui