Clean up after getPropertyCSSValue

Source/core/css/CSSFilterValue.cpp

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 64 matching lines @@
         break;
     default:
         break;
     }
 
     result.append(CSSValueList::customCSSText());
     result.append(')');
     return result.toString();
 }
 
-CSSFilterValue::CSSFilterValue(const CSSFilterValue& cloneFrom)
-    : CSSValueList(cloneFrom)
-    , m_type(cloneFrom.m_type)
-{
-}
-
-PassRefPtrWillBeRawPtr<CSSFilterValue> CSSFilterValue::cloneForCSSOM() const
-{
-    return adoptRefWillBeNoop(new CSSFilterValue(*this));
-}
-
 bool CSSFilterValue::equals(const CSSFilterValue& other) const
 {
     return m_type == other.m_type && CSSValueList::equals(other);
 }
 
 }