Remove dead host esszimmerradio

The Pi is gone; the name no longer resolves. It was still picked up by
the "hosts: all" playbooks (update-packages.yml, test_keepass.yml),
where it showed up as unreachable on every fleet run.

It was also the only host pointing pi_squeezelite_squeezeserver at
192.168.178.100 (musicdolphin) rather than the central server at .80,
so nothing depends on musicdolphin's LMS instance any more.

The "esszimmer" rows in roles/bluetooth_monitor/other/*.csv and the
analysis notebook are room labels in historical sensor training data,
not this host, and are left alone.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

scripts/networklogger/devices.md

@@ -23,7 +23,6 @@ Server:
   bedroompi
 
 
-  esszimmerradio
   musicdolphin
   
   no