Remove CURSOR_VISIBILITY, it's always off

Source/core/css/CSSPrimitiveValueMappings.h

Index: Source/core/css/CSSPrimitiveValueMappings.h
diff --git a/Source/core/css/CSSPrimitiveValueMappings.h b/Source/core/css/CSSPrimitiveValueMappings.h
index be8e24c005ed0984c837ced469920305a91fe2f0..9c565ec506a3e285ca547a4d8bc68a353922f347 100644
--- a/Source/core/css/CSSPrimitiveValueMappings.h
+++ b/Source/core/css/CSSPrimitiveValueMappings.h
@@ -1151,34 +1151,6 @@ template<> inline CSSPrimitiveValue::operator ECursor() const
     return static_cast<ECursor>(m_value.ident - CSSValueAuto);
 }
 
-
-#if ENABLE(CURSOR_VISIBILITY)
-template<> inline CSSPrimitiveValue::CSSPrimitiveValue(CursorVisibility e)
-    : CSSValue(PrimitiveClass)
-{
-    m_primitiveUnitType = CSS_IDENT;
-    switch (e) {
-    case CursorVisibilityAuto:
-        m_value.ident = CSSValueAuto;
-        break;
-    case CursorVisibilityAutoHide:
-        m_value.ident = CSSValueAutoHide;
-        break;
-    }
-}
-
-template<> inline CSSPrimitiveValue::operator CursorVisibility() const
-{
-    if (m_value.ident == CSSValueAuto)
-        return CursorVisibilityAuto;
-    if (m_value.ident == CSSValueAutoHide)
-        return CursorVisibilityAutoHide;
-
-    ASSERT_NOT_REACHED();
-    return CursorVisibilityAuto;
-}
-#endif
-
 template<> inline CSSPrimitiveValue::CSSPrimitiveValue(EDisplay e)
     : CSSValue(PrimitiveClass)
 {