Here's a mess:
I was poking at my home Panasonic phone system and found it has a poorly implemented BlueTooth option. On a whim, I paired it with my Indigo server, which succeeded but didn't actually do anything. There's no integration at any level aside from pairing.
Nevertheless, it looked like an output to, I suppose, home bridge-iTunes, so it created a device, which then propagated to my Home app.
I have since seen the folly of this pairing and deleted it. But the device remains inside of the Home app.
My question is: How can I get rid of it?