Why do you want to remove the rad?, isn't it the TRV that's the problem?.
If the TRV is shutting off on the frost setting, it doesn't matter whether it has a zero setting or not if you want to remove the rad, as long as you don't remove the actuator.
If the TRV is shutting off on the frost setting, it doesn't matter whether it has a zero setting or not if you want to remove the rad, as long as you don't remove the actuator.