Remove some dead code from bindings/ folder

Source/bindings/v8/DOMWrapperWorld.cpp

Index: Source/bindings/v8/DOMWrapperWorld.cpp
diff --git a/Source/bindings/v8/DOMWrapperWorld.cpp b/Source/bindings/v8/DOMWrapperWorld.cpp
index b336abd43cdff691b2ae85d26f78b41aa0a83747..2ddadfb6809577227e5bf8227f40e4097527459c 100644
--- a/Source/bindings/v8/DOMWrapperWorld.cpp
+++ b/Source/bindings/v8/DOMWrapperWorld.cpp
@@ -164,12 +164,6 @@ void DOMWrapperWorld::setIsolatedWorldSecurityOrigin(int worldId, PassRefPtr<Sec
         isolatedWorldSecurityOrigins().remove(worldId);
 }
 
-void DOMWrapperWorld::clearIsolatedWorldSecurityOrigin(int worldId)
-{
-    ASSERT(isIsolatedWorldId(worldId));
-    isolatedWorldSecurityOrigins().remove(worldId);
-}
-
 typedef HashMap<int, bool> IsolatedWorldContentSecurityPolicyMap;
 static IsolatedWorldContentSecurityPolicyMap& isolatedWorldContentSecurityPolicies()
 {
@@ -195,10 +189,4 @@ void DOMWrapperWorld::setIsolatedWorldContentSecurityPolicy(int worldId, const S
         isolatedWorldContentSecurityPolicies().remove(worldId);
 }
 
-void DOMWrapperWorld::clearIsolatedWorldContentSecurityPolicy(int worldId)
-{
-    ASSERT(isIsolatedWorldId(worldId));
-    isolatedWorldContentSecurityPolicies().remove(worldId);
-}
-
 } // namespace WebCore