Remove tons of OILPAN.

sky/engine/core/editing/RemoveNodeCommand.cpp

Index: sky/engine/core/editing/RemoveNodeCommand.cpp
diff --git a/sky/engine/core/editing/RemoveNodeCommand.cpp b/sky/engine/core/editing/RemoveNodeCommand.cpp
index bd0205908877b8e922ab0d90f4ecbfb8cbe179a2..6044ea78f42d0541ad031290a26421002c7b3f4b 100644
--- a/sky/engine/core/editing/RemoveNodeCommand.cpp
+++ b/sky/engine/core/editing/RemoveNodeCommand.cpp
@@ -65,12 +65,4 @@ void RemoveNodeCommand::doUnapply()
     parent->insertBefore(m_node.get(), refChild.get(), IGNORE_EXCEPTION);
 }
 
-void RemoveNodeCommand::trace(Visitor* visitor)
-{
-    visitor->trace(m_node);
-    visitor->trace(m_parent);
-    visitor->trace(m_refChild);
-    SimpleEditCommand::trace(visitor);
-}
-
 }