libkwineffects: Drop EffectsHandler::windowGeometryShapeChanged

It's very X11-specific and it's unused.

src/effects.cpp

@@ -307,13 +307,6 @@ void EffectsHandlerImpl::setupWindowConnections(Window *window)
         }
     });
     connect(window, &Window::modalChanged, this, &EffectsHandlerImpl::slotClientModalityChanged);
-    connect(window, &Window::geometryShapeChanged, this, [this, window](const QRectF &old) {
-        // during late cleanup effectWindow() may be already NULL
-        // in some functions that may still call this
-        if (window->effectWindow()) {
-            Q_EMIT windowGeometryShapeChanged(window->effectWindow(), old);;
-        }
-    });
     connect(window, &Window::frameGeometryChanged, this, [this, window](const QRectF &oldGeometry) {
         // effectWindow() might be nullptr during tear down of the client.
         if (window->effectWindow()) {

src/libkwineffects/kwineffects.h

@@ -1577,17 +1577,6 @@ Q_SIGNALS:
      */
     void windowMaximizedStateAboutToChange(KWin::EffectWindow *w, bool horizontal, bool vertical);
 
-    /**
-     * Signal emitted when the geometry or shape of a window changed.
-     * This is caused if the window changes geometry without user interaction.
-     * E.g. the decoration is changed. This is in opposite to windowUserMovedResized
-     * which is caused by direct user interaction.
-     * @param w The window whose geometry changed
-     * @param old The previous geometry
-     * @see windowUserMovedResized
-     * @since 4.7
-     */
-    void windowGeometryShapeChanged(KWin::EffectWindow *w, const QRectF &old);
     /**
      * This signal is emitted when the frame geometry of a window changed.
      * @param window The window whose geometry changed