Remove unused signal in Platform

platform.h

@@ -498,10 +498,6 @@ Q_SIGNALS:
     void screensQueried();
     void initFailed();
     void readyChanged(bool);
-    /**
-     * Emitted by backends using a one screen (nested window) approach and when the size of that changes.
-     */
-    void screenSizeChanged();
     void outputAdded(AbstractOutput *output);
     void outputRemoved(AbstractOutput *output);
 

plugins/platforms/x11/windowed/x11windowed_backend.cpp

@@ -45,7 +45,6 @@ X11WindowedBackend::X11WindowedBackend(QObject *parent)
 {
     setSupportsPointerWarping(true);
     setPerScreenRenderingEnabled(true);
-    connect(this, &X11WindowedBackend::sizeChanged, this, &X11WindowedBackend::screenSizeChanged);
 }
 
 X11WindowedBackend::~X11WindowedBackend()