Remove getNodesInCommand debug method from Editing commands

Source/core/editing/CompositeEditCommand.h

Index: Source/core/editing/CompositeEditCommand.h
diff --git a/Source/core/editing/CompositeEditCommand.h b/Source/core/editing/CompositeEditCommand.h
index ec0d2d4c74788856a3e495b768408c2a27b035ba..c738cb436d7a5d3eaf968503d43331daab2f3305 100644
--- a/Source/core/editing/CompositeEditCommand.h
+++ b/Source/core/editing/CompositeEditCommand.h
@@ -55,10 +55,6 @@ public:
     Element* startingRootEditableElement() const { return m_startingRootEditableElement.get(); }
     Element* endingRootEditableElement() const { return m_endingRootEditableElement.get(); }
 
-#ifndef NDEBUG
-    virtual void getNodesInCommand(HashSet<Node*>&);
-#endif
-
 private:
     EditCommandComposition(Document*, const VisibleSelection& startingSelection, const VisibleSelection& endingSelection, EditAction);