cc : Clean up cc clip tree

cc/test/layer_tree_settings_for_testing.cc

Index: cc/test/layer_tree_settings_for_testing.cc
diff --git a/cc/test/layer_tree_settings_for_testing.cc b/cc/test/layer_tree_settings_for_testing.cc
deleted file mode 100644
index bcd29aee57eda95de2730b5dd63ebd03a792512d..0000000000000000000000000000000000000000
--- a/cc/test/layer_tree_settings_for_testing.cc
+++ /dev/null
@@ -1,16 +0,0 @@
-// 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 "cc/test/layer_tree_settings_for_testing.h"
-
-namespace cc {
-
-LayerTreeSettingsForTesting::LayerTreeSettingsForTesting()
-    : LayerTreeSettings() {
-  verify_clip_tree_calculations = true;
-}
-
-LayerTreeSettingsForTesting::~LayerTreeSettingsForTesting() {}
-
-}  // namespace cc