Remove already-set option style feature for QCommandLinkButton

The QStyleOptionButton::CommandLinkButton feature is already set in the
QComnandLinkButton's initStyleOption() so remove its setting in the
paintEvent.

Change-Id: Ic1d723c0671d6d478825d7ba2173db72a8b39c36
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/widgets/widgets/qcommandlinkbutton.cpp

@@ -356,8 +356,6 @@ void QCommandLinkButton::paintEvent(QPaintEvent *)
     QStyleOptionButton option;
     initStyleOption(&option);
 
-    //Enable command link appearance on Vista
-    option.features |= QStyleOptionButton::CommandLinkButton;
     option.text = QString();
     option.icon = QIcon(); //we draw this ourselves
     QSize pixmapSize = icon().actualSize(iconSize());