Remove CSSValueList::equals(const CSSValue&)

Source/core/css/CSSValue.cpp

Index: Source/core/css/CSSValue.cpp
diff --git a/Source/core/css/CSSValue.cpp b/Source/core/css/CSSValue.cpp
index ff7445ca1d7508bc289eb98f84af56404f02fc46..a3c96db05b0203ec69b6b3a128344667f75250f9 100644
--- a/Source/core/css/CSSValue.cpp
+++ b/Source/core/css/CSSValue.cpp
@@ -157,10 +157,7 @@ bool CSSValue::equals(const CSSValue& other) const
             ASSERT_NOT_REACHED();
             return false;
         }
-    } else if (m_classType == ValueListClass && other.m_classType != ValueListClass)
-        return toCSSValueList(this)->equals(other);
-    else if (m_classType != ValueListClass && other.m_classType == ValueListClass)
-        return static_cast<const CSSValueList&>(other).equals(*this);
+    }
     return false;
 }