Remove unused/unneeded code from core/editing.

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 f758f7092e1b2f0a98434508522938e2ace2eb7f..65bc0dbd3535783a0eb780278abed77ed021e444 100644
--- a/Source/core/editing/CompositeEditCommand.h
+++ b/Source/core/editing/CompositeEditCommand.h
@@ -49,7 +49,6 @@ public:
     virtual void reapply() override;
     virtual EditAction editingAction() const override { return m_editAction; }
     void append(SimpleEditCommand*);
-    bool wasCreateLinkCommand() const { return m_editAction == EditActionCreateLink; }
 
     const VisibleSelection& startingSelection() const { return m_startingSelection; }
     const VisibleSelection& endingSelection() const { return m_endingSelection; }