message: That comment's now obsolete
diff: @@ -2545,9 +2545,6 @@ void renderer::on_key_press(key_event const& event)
  if (device_bvhs.empty())
  {
  - // TODO: that'll currently not happen, but would be
  - // helpful to defer the copy to not run oom although
  - // the device is not even used
  copy_bvhs(
  device_bvhs,
  device_top_level_bvh,
  