Remove some dead code from bindings/ folder

Source/bindings/v8/DOMWrapperWorld.h

 /*
  * Copyright (C) 2009 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 74 matching lines @@
         }
         return world(isolate->GetCurrentContext());
     }
 
     static DOMWrapperWorld& mainWorld();
 
     // Associates an isolated world (see above for description) with a security
     // origin. XMLHttpRequest instances used in that world will be considered
     // to come from that origin, not the frame's.
     static void setIsolatedWorldSecurityOrigin(int worldID, PassRefPtr<SecurityOrigin>);
-    static void clearIsolatedWorldSecurityOrigin(int worldID);
     SecurityOrigin* isolatedWorldSecurityOrigin();
 
     // Associated an isolated world with a Content Security Policy. Resources
     // embedded into the main world's DOM from script executed in an isolated
     // world should be restricted based on the isolated world's DOM, not the
     // main world's.
     //
     // FIXME: Right now, resource injection simply bypasses the main world's
     // DOM. More work is necessary to allow the isolated world's policy to be
     // applied correctly.
     static void setIsolatedWorldContentSecurityPolicy(int worldID, const String& policy);
-    static void clearIsolatedWorldContentSecurityPolicy(int worldID);
     bool isolatedWorldHasContentSecurityPolicy();
 
     bool isMainWorld() const { return m_worldId == MainWorldId; }
     bool isWorkerWorld() const { return m_worldId == WorkerWorldId; }
     bool isIsolatedWorld() const { return MainWorldId < m_worldId  && m_worldId < IsolatedWorldIdLimit; }
 
     int worldId() const { return m_worldId; }
     int extensionGroup() const { return m_extensionGroup; }
     DOMDataStore& domDataStore() { return *m_domDataStore; }
 
@@ skipping 12 matching lines @@
     static DOMWrapperWorld* worldOfInitializingWindow;
 
     const int m_worldId;
     const int m_extensionGroup;
     OwnPtr<DOMDataStore> m_domDataStore;
 };
 
 } // namespace WebCore
 
 #endif // DOMWrapperWorld_h