How do I remove redundant audio devices when no longer used?
It’s my understanding Roon will have an entry in settings audio for all devices detected on the network that is capable of playback. If those entries are not enabled they will not appear in the zone selection list.
I don’t know of any way to keep unused devices from being listed in Settings - Audio unless you remove the network connection to that device.
I think it’s a network discovery thing, what’s found is shown, if you want it as an output option, you need to enable it. Unavailable devices should disappear. Perhaps a core reboot is in order?
Can you elaborate a little further? What devices are there that you believe shouldn’t be? Perhaps you could share a screenshot of what you show and what your expected behavior is?