Remove parts of //cc we aren't using

cc/test/layer_tree_json_parser.h

Index: cc/test/layer_tree_json_parser.h
diff --git a/cc/test/layer_tree_json_parser.h b/cc/test/layer_tree_json_parser.h
deleted file mode 100644
index 83ea5196b5538cacefff6d18fbc0498e96ff3a28..0000000000000000000000000000000000000000
--- a/cc/test/layer_tree_json_parser.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2013 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 CC_TEST_LAYER_TREE_JSON_PARSER_H_
-#define CC_TEST_LAYER_TREE_JSON_PARSER_H_
-
-#include <string>
-
-#include "base/memory/ref_counted.h"
-
-namespace cc {
-
-class ContentLayerClient;
-class Layer;
-
-scoped_refptr<Layer> ParseTreeFromJson(std::string json,
-                                       ContentLayerClient* content_client);
-
-}  // namespace cc
-
-#endif  // CC_TEST_LAYER_TREE_JSON_PARSER_H_