gc plugin: remove ScriptWrappable destructor special case.

tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.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 CLASS_REQUIRES_FINALIZATION_BASE_H_
 #define CLASS_REQUIRES_FINALIZATION_BASE_H_
 
 #include "heap/stubs.h"
 
 namespace blink {
@@ skipping 13 matching lines @@
 public:
     void trace(Visitor*);
 };
 
 // Base does not need finalization.
 class DoesNotNeedFinalizer : public A {
 public:
     void trace(Visitor*);
 };
 
-class GCedClassWithAScriptWrappableBase
-    : public A, public ScriptWrappable {
-public:
-    void trace(Visitor*);
-};
-
-class GCedClassWithAScriptWrappableAndAFinalizableBase
-    : public GCedClassWithAScriptWrappableBase
-    , public B
-    , public ScriptWrappable {
-public:
-    void trace(Visitor*);
-};
-
 }
 
 #endif