Remove getNodesInCommand debug method from Editing commands

Source/core/editing/EditCommand.h

Index: Source/core/editing/EditCommand.h
diff --git a/Source/core/editing/EditCommand.h b/Source/core/editing/EditCommand.h
index 517259bcc34d14800630143eb7be409f90fe3fda..41d3edf3c8a121d7aaf40779d2ec3699c5b7da84 100644
--- a/Source/core/editing/EditCommand.h
+++ b/Source/core/editing/EditCommand.h
@@ -83,17 +83,9 @@ public:
     virtual void doUnapply() = 0;
     virtual void doReapply(); // calls doApply()
 
-#ifndef NDEBUG
-    virtual void getNodesInCommand(HashSet<Node*>&) = 0;
-#endif
-
 protected:
     explicit SimpleEditCommand(Document& document) : EditCommand(document) { }
 
-#ifndef NDEBUG
-    void addNodeAndDescendants(Node*, HashSet<Node*>&);
-#endif
-
 private:
     virtual bool isSimpleEditCommand() const OVERRIDE { return true; }
 };