Remove getNodesInCommand debug method from Editing commands

Source/core/editing/SplitElementCommand.cpp

Index: Source/core/editing/SplitElementCommand.cpp
diff --git a/Source/core/editing/SplitElementCommand.cpp b/Source/core/editing/SplitElementCommand.cpp
index 11ec640704ed3200e7a0b796325c58c20018db9a..e4227cad72647f074c679bcae62fd2337f5b0dc6 100644
--- a/Source/core/editing/SplitElementCommand.cpp
+++ b/Source/core/editing/SplitElementCommand.cpp
@@ -107,13 +107,4 @@ void SplitElementCommand::doReapply()
     executeApply();
 }
 
-#ifndef NDEBUG
-void SplitElementCommand::getNodesInCommand(HashSet<Node*>& nodes)
-{
-    addNodeAndDescendants(m_element1.get(), nodes);
-    addNodeAndDescendants(m_element2.get(), nodes);
-    addNodeAndDescendants(m_atChild.get(), nodes);
-}
-#endif
-
 } // namespace WebCore