citra-qt: remove dead code

src/citra_qt/main.cpp

@@ -612,7 +612,6 @@ void GMainWindow::OnConfigure() {
     auto result = configureDialog.exec();
     if (result == QDialog::Accepted) {
         configureDialog.applyConfiguration();
-        render_window->ReloadSetKeymaps();
         config->Save();
     }
 }