Remove deprecated getPresentationAttribute

Source/core/svg/SVGElement.cpp

Index: Source/core/svg/SVGElement.cpp
diff --git a/Source/core/svg/SVGElement.cpp b/Source/core/svg/SVGElement.cpp
index d0648dccdef1c8a04f4d95ee009536bf63d10b3a..e5ce7a6c412f594d6c9bff412dddca7f1bcfe217 100644
--- a/Source/core/svg/SVGElement.cpp
+++ b/Source/core/svg/SVGElement.cpp
@@ -256,24 +256,6 @@ String SVGElement::title() const
     return String();
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> SVGElement::getPresentationAttribute(const AtomicString& name)
-{
-    if (!hasAttributesWithoutUpdate())
-        return nullptr;
-
-    QualifiedName attributeName(nullAtom, name, nullAtom);
-    const Attribute* attr = getAttributeItem(attributeName);
-    if (!attr)
-        return nullptr;
-
-    RefPtrWillBeRawPtr<MutableStylePropertySet> style = MutableStylePropertySet::create(SVGAttributeMode);
-    CSSPropertyID propertyID = SVGElement::cssPropertyIdForSVGAttributeName(attr->name());
-    style->setProperty(propertyID, attr->value());
-    RefPtrWillBeRawPtr<CSSValue> cssValue = style->getPropertyCSSValue(propertyID);
-    return cssValue ? cssValue->cloneForCSSOM() : nullptr;
-}
-
-
 bool SVGElement::instanceUpdatesBlocked() const
 {
     return hasSVGRareData() && svgRareData()->instanceUpdatesBlocked();