Clean up after getPropertyCSSValue

Source/core/css/CSSFilterValue.cpp

Index: Source/core/css/CSSFilterValue.cpp
diff --git a/Source/core/css/CSSFilterValue.cpp b/Source/core/css/CSSFilterValue.cpp
index 74e5d3435c12fde8c337aed637efd12064627834..f05f746b1c878110fee51418b6a0a2dd2b84ab16 100644
--- a/Source/core/css/CSSFilterValue.cpp
+++ b/Source/core/css/CSSFilterValue.cpp
@@ -82,17 +82,6 @@ String CSSFilterValue::customCSSText() const
     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);