READY page: drop the MICS and STAGE keys

BOH MIX is the one tap key left.

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

status_panel.py

@@ -553,7 +553,7 @@ def check_ready(chk, snap, ctx):
 
 
 def check_ready_manual(chk, snap, ctx):
-    """A checklist line only a person can see (BOH mix, stage): a tap marks it done for the week."""
+    """A checklist line only a person can judge (BOH mix): a tap marks it done for the week."""
     done = ctx.get("ready_done", {}).get(chk["item"])
     if done:
         return [("done", Result(OK, info="DONE " + datetime.fromtimestamp(done).strftime("%a %H:%M").upper()))]