fix: remove db_patch call — no PATCH endpoint for scout_opportunities

The database API only has GET/POST/DELETE for scout_opportunities.
The expires_at update is non-critical — the view timeout controls
the actual scout window.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cogs/admins.py

@@ -777,15 +777,6 @@ class Admins(commands.Cog):
         now = datetime.datetime.now()
         expires_dt = now + datetime.timedelta(minutes=minutes)
         expires_unix = int(expires_dt.timestamp())
-        expires_at_ms = int_timestamp(expires_dt)
-
-        # Update the scout opportunity's expires_at in the database
-        await db_patch(
-            "scout_opportunities",
-            scout_opp_id,
-            params=[("expires_at", expires_at_ms)],
-        )
-
         embed, card_lines = build_scout_embed(
             opener_team, cards, expires_unix=expires_unix
         )