ServiceWorker: Remove outdated InstallEvent::replace()

Source/modules/serviceworkers/InstallEvent.cpp

Index: Source/modules/serviceworkers/InstallEvent.cpp
diff --git a/Source/modules/serviceworkers/InstallEvent.cpp b/Source/modules/serviceworkers/InstallEvent.cpp
index e60217af47e714a6b65c48435a30ca976f6b7cbd..a7d85551d594c2b9a69824abf7d00972cd2cf10d 100644
--- a/Source/modules/serviceworkers/InstallEvent.cpp
+++ b/Source/modules/serviceworkers/InstallEvent.cpp
@@ -32,7 +32,6 @@
 #include "InstallEvent.h"
 
 #include "modules/serviceworkers/WaitUntilObserver.h"
-#include "platform/NotImplemented.h"
 #include "wtf/RefPtr.h"
 #include <v8.h>
 
@@ -48,12 +47,6 @@ PassRefPtrWillBeRawPtr<InstallEvent> InstallEvent::create(const AtomicString& ty
     return adoptRefWillBeNoop(new InstallEvent(type, initializer, observer));
 }
 
-void InstallEvent::replace()
-{
-    // FIXME: implement.
-    notImplemented();
-}
-
 const AtomicString& InstallEvent::interfaceName() const
 {
     return EventNames::InstallEvent;