Remove toSVGStopElement(SVGElement*) because it can be covered by toSVGStopElement(Node*)

Source/core/svg/SVGStopElement.h

Index: Source/core/svg/SVGStopElement.h
diff --git a/Source/core/svg/SVGStopElement.h b/Source/core/svg/SVGStopElement.h
index 025e57dc3acb98b5c6bb1afaff03602ceafe3286..828c7f7615eaf5300d1d67a581211f375b041a95 100644
--- a/Source/core/svg/SVGStopElement.h
+++ b/Source/core/svg/SVGStopElement.h
@@ -52,16 +52,10 @@ private:
 
 inline SVGStopElement* toSVGStopElement(Node* node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(SVGNames::stopTag));
+    ASSERT_WITH_SECURITY_IMPLICATION(!node || toSVGElement(node)->isGradientStop());
     return static_cast<SVGStopElement*>(node);
 }
 
-inline SVGStopElement* toSVGStopElement(SVGElement* element)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!element || element->isGradientStop());
-    return static_cast<SVGStopElement*>(element);
-}
-
 } // namespace WebCore
 
 #endif