Remove 'using' of QPaintEngineEx methods from QRasterPaintEngine.

drawEllipse() and the drawPolygon() overloads are all reimplemented, so there is
no point having this here.

Change-Id: I343cea0dd0fff2ed6a27be2a19459056e929f9d8
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/gui/painting/qpaintengine_raster_p.h

@@ -207,13 +207,6 @@ public:
     ClipType clipType() const;
     QRect clipBoundingRect() const;
 
-#ifdef Q_NO_USING_KEYWORD
-    inline void drawEllipse(const QRect &rect) { QPaintEngineEx::drawEllipse(rect); }
-#else
-    using QPaintEngineEx::drawPolygon;
-    using QPaintEngineEx::drawEllipse;
-#endif
-
     void releaseBuffer();
 
     QSize size() const;