Revert "qt: Disable OpenGL 3.0 renderer for macOS."

This reverts commit d3b00ff27b.

src/qt/qt_rendererstack.cpp

@@ -22,21 +22,15 @@
 #include "ui_qt_rendererstack.h"
 
 #include "qt_hardwarerenderer.hpp"
+#include "qt_openglrenderer.hpp"
 #include "qt_softwarerenderer.hpp"
 
-#ifndef Q_OS_MACOS
-#    include "qt_openglrenderer.hpp"
-#else
-#    include "qt_opengldummy.hpp"
-#endif
-
 #include "qt_mainwindow.hpp"
 #include "qt_util.hpp"
 
 #include "evdev_mouse.hpp"
 
 #include <QScreen>
-#include <QTimer>
 
 #ifdef __APPLE__
 #    include <CoreGraphics/CoreGraphics.h>