Remove support for Document.createEvent() without argument

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 4845c046c1615d0eb68e82d89e5535b9dc29501c..3e99a1bfe7116868bcadeea0b3e41a5c0f80530b 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -3856,18 +3856,6 @@ PassRefPtrWillBeRawPtr<Event> Document::createEvent(const String& eventType, Exc
     return nullptr;
 }
 
-PassRefPtrWillBeRawPtr<Event> Document::createEvent(ExceptionState& exceptionState)
-{
-    if (!isSVGDocument()) {
-        exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, 0));
-        return nullptr;
-    }
-
-    UseCounter::count(this, UseCounter::DocumentCreateEventOptionalArgument);
-    // Legacy SVGDocument behavior.
-    return createEvent("undefined", exceptionState);
-}
-
 void Document::addMutationEventListenerTypeIfEnabled(ListenerType listenerType)
 {
     if (ContextFeatures::mutationEventsEnabled(this))