ServiceWorker: Remove outdated InstallEvent::replace()

Source/modules/serviceworkers/InstallEvent.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class InstallEvent final : public ExtendableEvent {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<InstallEvent> create();
     static PassRefPtrWillBeRawPtr<InstallEvent> create(const AtomicString& type, const EventInit&, WaitUntilObserver*);
 
-    void replace();
-
     virtual const AtomicString& interfaceName() const override;
 
     virtual void trace(Visitor*) override;
 
 private:
     InstallEvent();
     InstallEvent(const AtomicString& type, const EventInit&, WaitUntilObserver*);
 };
 
 } // namespace blink
 
 #endif // InstallEvent_h