Remove code that is unused after ContextMenu cleanup

Source/core/inspector/InspectorController.h

 /*
  * Copyright (C) 2011 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 65 matching lines @@
     WTF_MAKE_FAST_ALLOCATED;
 public:
     ~InspectorController();
 
     static PassOwnPtr<InspectorController> create(Page*, InspectorClient*);
     void inspectedPageDestroyed();
 
     Page* inspectedPage() const;
 
     void setInspectorFrontendClient(PassOwnPtr<InspectorFrontendClient>);
-    bool hasInspectorFrontendClient() const;
     void didClearWindowObjectInWorld(Frame*, DOMWrapperWorld*);
     void setInjectedScriptForOrigin(const String& origin, const String& source);
 
     void dispatchMessageFromFrontend(const String& message);
 
     bool hasFrontend() const { return m_inspectorFrontend; }
     void connectFrontend(InspectorFrontendChannel*);
     void disconnectFrontend();
     void reconnectFrontend(InspectorFrontendChannel*, const String& inspectorStateCookie);
     void setProcessId(long);
@@ skipping 59 matching lines @@
     Page* m_page;
     InspectorClient* m_inspectorClient;
     InspectorAgentRegistry m_agents;
     bool m_isUnderTest;
 };
 
 }
 
 
 #endif // !defined(InspectorController_h)