fix Warning

qt6-after/qt6-migrated-legatus/Lts/Tools/Adler/WebSocketSimulator/main.cpp

@@ -33,7 +33,7 @@ int main(int argc, char **argv)
 
   NGLApplication app(argc, argv);
   QApplication::setQuitOnLastWindowClosed(true); // we are cool enough to handle it ourselves 8)
-  QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+  // Qt::AA_UseHighDpiPixmaps: no-op since Qt6 (high-DPI pixmaps are always enabled)
   QNetworkProxy::setApplicationProxy(QNetworkProxy()); // do NOT use proxies anywhere!
 
   app.createLogger("awss", "log4cxx_adlerWebSocketSimulator.props");