Remove the rtpMIDI-restart fix for the Lighting PC MIDI

Tested live: restarting rtpMIDIService brought the Lighting PC's Bonjour
advert back but dropped it from the NA Ingest and NA Tracks sessions, and it
did not rejoin them. macOS only exposes the default network session to
scripts, not NA Ingest's named one, so there is no safe automatic reconnect.
MIDI now has no hold fix; the README says how to reconnect by hand.

ssh fixes run with LogLevel=ERROR so warnings stay out of the log.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -50,7 +50,7 @@ Row 0 holds the group buttons. Each one shows the first problem in its group, pl
   | APPS: VISTA SILENT | starts Vista on the Lighting PC if it is not running. A running Vista is never closed. |
   | ARENA | starts Resolume Arena on the Lighting PC if it is not running, then reconnects Companion |
   | OBS | starts OBS on the LiveStream PC if it is not running, then reconnects Companion. If the PC is off, it is woken (Wake-on-LAN) and the button shows WAKING PC; hold again once someone has logged in. |
-  | MIDI: LIGHT PC | restarts rtpMIDI on the Lighting PC; it reconnects to NA Ingest, NA ProP and NA Tracks by itself. Lighting MIDI drops for a few seconds. |
+  | MIDI: LIGHT PC | no automatic fix. Restarting rtpMIDI drops the PC from every MIDI session and it does not rejoin them, and macOS gives scripts no way to reconnect a named session. Reconnect it by hand in rtpMIDI (session "Lighting PC" → Directory → Connect). |
   | DANTE: PROP MAC / TRACKS / TRANSL / INGEST GONE | starts Dante Virtual Soundcard's engine on that Mac (`remote-access/mac-dvs-helper.sh`) |
   | DANTE: any device powered by its switch port (today the four Studio B boxes) | power-cycles the port it is on **now**, found by its MAC on the Netgear Dante switches |
   | DANTE: any other device GONE | restarts Companion's Dante module (hardware: if still gone, it is off or unplugged) |