Revert "make screen filtering work with Qt rendering, too"

fuck everything

src/frontend/qt_sdl/Screen.cpp

@@ -668,8 +668,6 @@ void ScreenPanelNative::paintEvent(QPaintEvent* event)
 {
     QPainter painter(this);
 
-    painter.setRenderHint(QPainter::SmoothPixmapTransform, filter);
-
     // fill background
     painter.fillRect(event->rect(), QColor::fromRgb(0, 0, 0));
 

src/frontend/qt_sdl/Window.cpp

@@ -761,6 +761,7 @@ void MainWindow::createScreenPanel()
     }
     setCentralWidget(panel);
 
+    actScreenFiltering->setEnabled(hasOGL);
     panel->osdSetEnabled(showOSD);
 
     connect(this, SIGNAL(screenLayoutChange()), panel, SLOT(onScreenLayoutChanged()));