message: remove print nodes from main window
diff: @@ -1011,8 +1011,6 @@ void MainWindow::importFiles(sg::NodePtr world)
  importer->setAnimationList(animations);
  importer->importScene();
  }
  -
  - world->traverse<sg::PrintNodes>();
  }
  } catch (...) {
  std::cerr << "Failed to open file '" << file << "'!\n";
  