Remove getNodesInCommand debug method from Editing commands

Source/core/editing/CompositeEditCommand.cpp

Index: Source/core/editing/CompositeEditCommand.cpp
diff --git a/Source/core/editing/CompositeEditCommand.cpp b/Source/core/editing/CompositeEditCommand.cpp
index b049591423e2fdb76766f90956b54f5b7d56defe..53a6fa44a985110b4ee6e719fa8b3886f620c7f2 100644
--- a/Source/core/editing/CompositeEditCommand.cpp
+++ b/Source/core/editing/CompositeEditCommand.cpp
@@ -144,15 +144,6 @@ void EditCommandComposition::setEndingSelection(const VisibleSelection& selectio
     m_endingRootEditableElement = selection.rootEditableElement();
 }
 
-#ifndef NDEBUG
-void EditCommandComposition::getNodesInCommand(HashSet<Node*>& nodes)
-{
-    size_t size = m_commands.size();
-    for (size_t i = 0; i < size; ++i)
-        m_commands[i]->getNodesInCommand(nodes);
-}
-#endif
-
 void applyCommand(PassRefPtr<CompositeEditCommand> command)
 {
     command->apply();