Are you sure it has no telemetry? The only way I can think to be sure would be to block it in your router. Lots of software still does telemetry even if you try to disable it. There was a researcher a while back who found out that iOS sends in telemetry even if you explicitly disable it. He had to basically MITM his own phone and watch all the packets in Wireshark, but he figured out it was sending telemetry even with all the telemetry options disabled.