To my knowledge there is no way to remove this from the phone remotely. If there was it would be a huge security problem. If you could just tell the phone to erase the CTL and then download a new one, it would be relatively simple to make it download a fake CTL and become a TLS proxy for that phone. The security guide states that LSC enrollment is supposed to happen over a trusted network only. Depending on your environment, "trusted network" is one of those magic terms (e.g. government/military).
As for extension mobility: I believe an EM login will persist across restarts. I would test one or two phones to confirm though.
Sounds like it is time to buy new walking shoes. :)