Remove dead code from Dictionary

Source/bindings/v8/Dictionary.h

 /*
  * Copyright (C) 2010 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 84 matching lines @@
     bool get(const String&, RefPtr<CSSFontFaceRule>&) const;
     bool get(const String&, RefPtr<DOMError>&) const;
     bool get(const String&, RefPtr<VoidCallback>&) const;
     bool get(const String&, v8::Local<v8::Value>&) const;
 
     bool getOwnPropertiesAsStringHashMap(HashMap<String, String>&) const;
     bool getOwnPropertyNames(Vector<String>&) const;
 
     bool getWithUndefinedOrNullCheck(const String&, String&) const;
 
-    PassRefPtr<EventListener> getEventListener(const String&, Notification*) const { return 0; }
-
 private:
     bool getKey(const String& key, v8::Local<v8::Value>&) const;
 
     // This object can only be used safely when stack allocated because of v8::Local.
     static void* operator new(size_t);
     static void* operator new[](size_t);
     static void operator delete(void *);
 
     v8::Local<v8::Value> m_options;
     v8::Isolate* m_isolate;
 };
 
 }
 
 #endif // Dictionary_h