Removing Thermostat from Panel

I no longer have 2 thermostats connected. I want to remove them from the panel. Is there a way to do that? Going through the panel it is searching for the thermostats but won’t find them because they’re not connected. Can they be removed some other way or remotely through you guys?

So you no longer have the tstats hooked up and you want to remove them? If you could give me the Device ID and/or name of the device to clarify which devices need to be deleted we would be happy to help!