refactor(server_routes): drop unused 'now' kwarg from _live_state render

After the timeago migration, the live-state template no longer reads
'now' — it computes relative labels through the filter, which derives
its own reference time.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

l4d2web/l4d2web/routes/server_routes.py

@@ -270,6 +270,5 @@ def live_state_fragment(server_id: int) -> Response:
         snapshot_fresh=(latest is not None and latest.last_seen_at >= cutoff),
         current_players=current_rows,
         recent_players=recent_rows,
-        now=datetime.now(UTC).replace(tzinfo=None),
         poll_seconds=max(1, int(current_app.config.get("LIVE_STATE_POLL_SECONDS", 5))),
     )