Remove tons of OILPAN.

sky/engine/core/editing/InsertNodeBeforeCommand.cpp

Index: sky/engine/core/editing/InsertNodeBeforeCommand.cpp
diff --git a/sky/engine/core/editing/InsertNodeBeforeCommand.cpp b/sky/engine/core/editing/InsertNodeBeforeCommand.cpp
index b550844286fad6301ae0906b74c0a752263f1a75..74e34ecd89ff805e31aecf364af59325731947c7 100644
--- a/sky/engine/core/editing/InsertNodeBeforeCommand.cpp
+++ b/sky/engine/core/editing/InsertNodeBeforeCommand.cpp
@@ -63,11 +63,4 @@ void InsertNodeBeforeCommand::doUnapply()
     m_insertChild->remove(IGNORE_EXCEPTION);
 }
 
-void InsertNodeBeforeCommand::trace(Visitor* visitor)
-{
-    visitor->trace(m_insertChild);
-    visitor->trace(m_refChild);
-    SimpleEditCommand::trace(visitor);
-}
-
 }