Remove the minimized-to-tray notification

tools/chatgui/src/mainwindow.cpp

@@ -1001,8 +1001,6 @@ void MainWindow::closeEvent(QCloseEvent *event) {
     DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: closeEvent — hiding to tray");
     saveWindowGeometry();
     hide();
-    m_trayIcon->showMessage("vibechat", QCoreApplication::translate("ChatGui", "Application minimized to tray."),
-                             QSystemTrayIcon::Information, 2000);
     event->ignore();
 }