Remove some dead code from bindings/ folder

Source/bindings/v8/DOMWrapperWorld.cpp

 /*
  * 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 146 matching lines @@
 
 void DOMWrapperWorld::setIsolatedWorldSecurityOrigin(int worldId, PassRefPtr<SecurityOrigin> securityOrigin)
 {
     ASSERT(isIsolatedWorldId(worldId));
     if (securityOrigin)
         isolatedWorldSecurityOrigins().set(worldId, securityOrigin);
     else
         isolatedWorldSecurityOrigins().remove(worldId);
 }
 
-void DOMWrapperWorld::clearIsolatedWorldSecurityOrigin(int worldId)
-{
-    ASSERT(isIsolatedWorldId(worldId));
-    isolatedWorldSecurityOrigins().remove(worldId);
-}
-
 typedef HashMap<int, bool> IsolatedWorldContentSecurityPolicyMap;
 static IsolatedWorldContentSecurityPolicyMap& isolatedWorldContentSecurityPolicies()
 {
     ASSERT(isMainThread());
     DEFINE_STATIC_LOCAL(IsolatedWorldContentSecurityPolicyMap, map, ());
     return map;
 }
 
 bool DOMWrapperWorld::isolatedWorldHasContentSecurityPolicy()
 {
     ASSERT(this->isIsolatedWorld());
     IsolatedWorldContentSecurityPolicyMap& policies = isolatedWorldContentSecurityPolicies();
     IsolatedWorldContentSecurityPolicyMap::iterator it = policies.find(worldId());
     return it == policies.end() ? false : it->value;
 }
 
 void DOMWrapperWorld::setIsolatedWorldContentSecurityPolicy(int worldId, const String& policy)
 {
     ASSERT(isIsolatedWorldId(worldId));
     if (!policy.isEmpty())
         isolatedWorldContentSecurityPolicies().set(worldId, true);
     else
         isolatedWorldContentSecurityPolicies().remove(worldId);
 }
 
-void DOMWrapperWorld::clearIsolatedWorldContentSecurityPolicy(int worldId)
-{
-    ASSERT(isIsolatedWorldId(worldId));
-    isolatedWorldContentSecurityPolicies().remove(worldId);
-}
-
 } // namespace WebCore