diff --git a/src/gui/kernel/qwindowsysteminterface.cpp b/src/gui/kernel/qwindowsysteminterface.cpp
index e447e4d0aa..ad9a3d2039 100644
--- a/src/gui/kernel/qwindowsysteminterface.cpp
+++ b/src/gui/kernel/qwindowsysteminterface.cpp
@@ -1145,23 +1145,6 @@ Q_GUI_EXPORT void qt_handleMouseEvent(QWindow *window, const QPointF &local, con
                 timestamp, local * factor, global * factor, state, button, type, mods);
 }
 
-// Wrapper for compatibility with Qt < 5.11
-// ### Qt6: Remove
-Q_GUI_EXPORT void qt_handleMouseEvent(QWindow *window, const QPointF &local, const QPointF &global,
-                                      Qt::MouseButtons b, Qt::KeyboardModifiers mods, int timestamp)
-{
-    const qreal factor = QHighDpiScaling::factor(window);
-    QWindowSystemInterface::handleMouseEvent<QWindowSystemInterface::SynchronousDelivery>(window,
-                timestamp, local * factor, global * factor, b, Qt::NoButton, QEvent::None, mods);
-}
-
-// Wrapper for compatibility with Qt < 5.6
-// ### Qt6: Remove
-Q_GUI_EXPORT void qt_handleMouseEvent(QWindow *w, const QPointF &local, const QPointF &global, Qt::MouseButtons b, Qt::KeyboardModifiers mods = Qt::NoModifier)
-{
-    qt_handleMouseEvent(w, local, global, b, mods, QWindowSystemInterfacePrivate::eventTime.elapsed());
-}
-
 Q_GUI_EXPORT void qt_handleKeyEvent(QWindow *window, QEvent::Type t, int k, Qt::KeyboardModifiers mods, const QString & text = QString(), bool autorep = false, ushort count = 1)
 {
     QWindowSystemInterface::handleKeyEvent<QWindowSystemInterface::SynchronousDelivery>(window, t, k, mods, text, autorep, count);