Remove duplicate links

Author: nxtn

docs/mfc/optimizing-control-drawing.md

@@ -40,6 +40,5 @@ Finally, to eliminate unnecessary `SelectObject` calls, modify `OnDraw` as follo
 [MFC ActiveX Controls: Optimization](../mfc/mfc-activex-controls-optimization.md)<br/>
 [COleControl Class](../mfc/reference/colecontrol-class.md)<br/>
 [MFC ActiveX Controls](../mfc/mfc-activex-controls.md)<br/>
-[MFC ActiveX Controls](../mfc/mfc-activex-controls.md)<br/>
 [MFC ActiveX Control Wizard](../mfc/reference/mfc-activex-control-wizard.md)<br/>
 [MFC ActiveX Controls: Painting an ActiveX Control](../mfc/mfc-activex-controls-painting-an-activex-control.md)