Remove bad assertion in SVGSMILElement's constructQualifiedName()

Source/core/svg/animation/SVGSMILElement.cpp

Index: Source/core/svg/animation/SVGSMILElement.cpp
diff --git a/Source/core/svg/animation/SVGSMILElement.cpp b/Source/core/svg/animation/SVGSMILElement.cpp
index 00db35def9def2f2f16902a6be8ae5524e04799e..2d68d22e01064e789d328daa7a70498d01b6d4e2 100644
--- a/Source/core/svg/animation/SVGSMILElement.cpp
+++ b/Source/core/svg/animation/SVGSMILElement.cpp
@@ -270,7 +270,7 @@ static inline QualifiedName constructQualifiedName(const SVGElement* svgElement,
 
     AtomicString prefix;
     AtomicString localName;
-    if (!Document::parseQualifiedName(attributeName, prefix, localName, ASSERT_NO_EXCEPTION))
+    if (!Document::parseQualifiedName(attributeName, prefix, localName, IGNORE_EXCEPTION))
         return anyQName();
 
     const AtomicString& namespaceURI = svgElement->lookupNamespaceURI(prefix);