You should be able to de-authorize it from any working Google login on another device - the security page shows all of your other Google sessions, and you can k

You should be able to de-authorize it from any working Google login on another device - the security page shows all of your other Google sessions, and you can kill any of them. It even nags you to kill ones that haven't been used in over a month or so. Seems to be even more effective than logging out on the device, though that's probably a good idea too if you can.