diff --git a/src/plugins/platforms/windows/qwindowsglcontext.cpp b/src/plugins/platforms/windows/qwindowsglcontext.cpp
index cfd73519fa0..5ca52c2c19e 100644
--- a/src/plugins/platforms/windows/qwindowsglcontext.cpp
+++ b/src/plugins/platforms/windows/qwindowsglcontext.cpp
@@ -1262,7 +1262,6 @@ bool QWindowsGLContext::makeCurrent(QPlatformSurface *surface)
 
     // Do we already have a DC entry for that window?
     auto *window = static_cast<QWindowsWindow *>(surface);
-    window->aboutToMakeCurrent();
     const HWND hwnd = window->handle();
     if (const QOpenGLContextData *contextData = findByHWND(m_windowContexts, hwnd)) {
         // Repeated calls to wglMakeCurrent when vsync is enabled in the driver will
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 3b3f15610cc..c2c093faf4a 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -430,11 +430,7 @@ static inline bool windowIsAccelerated(const QWindow *w)
 {
     switch (w->surfaceType()) {
     case QSurface::OpenGLSurface:
-        return true;
-    case QSurface::RasterGLSurface:
-        return qt_window_private(const_cast<QWindow *>(w))->compositing;
     case QSurface::VulkanSurface:
-        return true;
     case QSurface::Direct3DSurface:
         return true;
     default:
@@ -3442,24 +3438,6 @@ void QWindowsWindow::registerTouchWindow()
         qErrnoWarning("RegisterTouchWindow() failed for window '%s'.", qPrintable(window()->objectName()));
 }
 
-void QWindowsWindow::aboutToMakeCurrent()
-{
-#ifndef QT_NO_OPENGL
-    // For RasterGLSurface windows, that become OpenGL windows dynamically, it might be
-    // time to set up some GL specifics.  This is particularly important for layered
-    // windows (WS_EX_LAYERED due to alpha > 0).
-    const bool isCompositing = qt_window_private(window())->compositing;
-    if (isCompositing != testFlag(Compositing)) {
-        if (isCompositing)
-            setFlag(Compositing);
-        else
-            clearFlag(Compositing);
-
-        updateGLWindowSettings(window(), m_data.hwnd, m_data.flags, m_opacity);
-    }
-#endif
-}
-
 void QWindowsWindow::setHasBorderInFullScreenStatic(QWindow *window, bool border)
 {
     if (QPlatformWindow *handle = window->handle())
diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index 0d393ecbb50..024711e7f35 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -324,7 +324,6 @@ public:
 
     void *surface(void *nativeConfig, int *err);
     void invalidateSurface() override;
-    void aboutToMakeCurrent();
 
     void setAlertState(bool enabled) override;
     bool isAlertState() const override { return testFlag(AlertState); }