Remove GarbageCollected support from the bindings

sky/engine/bindings/tests/idls/TestInterfaceGarbageCollected.idl

Index: sky/engine/bindings/tests/idls/TestInterfaceGarbageCollected.idl
diff --git a/sky/engine/bindings/tests/idls/TestInterfaceGarbageCollected.idl b/sky/engine/bindings/tests/idls/TestInterfaceGarbageCollected.idl
deleted file mode 100644
index 55739a3da0897c632a05b0a60fa06cd196e08fe3..0000000000000000000000000000000000000000
--- a/sky/engine/bindings/tests/idls/TestInterfaceGarbageCollected.idl
+++ /dev/null
@@ -1,11 +0,0 @@
-// 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.
-
-[
-    Constructor(DOMString str),
-    GarbageCollected,
-] interface TestInterfaceGarbageCollected : EventTarget { // Inherit from EventTarget to test order of internal fields
-    attribute TestInterfaceGarbageCollected attr1;
-    void func(TestInterfaceGarbageCollected arg);
-};