Remove getNodesInCommand debug method from Editing commands

Source/core/editing/SplitTextNodeCommand.cpp

Index: Source/core/editing/SplitTextNodeCommand.cpp
diff --git a/Source/core/editing/SplitTextNodeCommand.cpp b/Source/core/editing/SplitTextNodeCommand.cpp
index 81f38af7d869d0b40fd3e256c47a32d03b8a3d72..1399154a9b9b4003634835ef291bd6d199e91071 100644
--- a/Source/core/editing/SplitTextNodeCommand.cpp
+++ b/Source/core/editing/SplitTextNodeCommand.cpp
@@ -103,12 +103,4 @@ void SplitTextNodeCommand::insertText1AndTrimText2()
     m_text2->deleteData(0, m_offset, es, DeprecatedAttachNow);
 }
 
-#ifndef NDEBUG
-void SplitTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
-{
-    addNodeAndDescendants(m_text1.get(), nodes);
-    addNodeAndDescendants(m_text2.get(), nodes);
-}
-#endif
-
 } // namespace WebCore