Q_UNUSED with an unknown type causes a build failure on windows

libs/kopageapp/KoPAViewMode.cpp

@@ -102,11 +102,8 @@ const KoPageLayout &KoPAViewMode::activePageLayout() const
     return m_view->activePage()->pageLayout();
 }
 
-void KoPAViewMode::changePageLayout( const KoPageLayout &pageLayout, bool applyToDocument, KUndo2Command *parent )
+void KoPAViewMode::changePageLayout( const KoPageLayout &/*pageLayout*/, bool /*applyToDocument*/, KUndo2Command */*parent*/ )
 {
-    Q_UNUSED( pageLayout );
-    Q_UNUSED( applyToDocument );
-    Q_UNUSED( parent );
 }
 
 QPointF KoPAViewMode::origin()

libs/kopageapp/tools/backgroundTool/KoPABackgroundTool.cpp

@@ -50,10 +50,8 @@ KoPABackgroundTool::~KoPABackgroundTool()
 }
 
 
-void KoPABackgroundTool::paint( QPainter &painter, const KoViewConverter &converter)
+void KoPABackgroundTool::paint( QPainter &/*painter*/, const KoViewConverter &/*converter*/)
 {
-    Q_UNUSED( painter );
-    Q_UNUSED( converter );
 }
 
 void KoPABackgroundTool::activate(ToolActivation toolActivation, const QSet<KoShape*> &)