firebase_website: drop the sysinfo sync to Firestore

The website bot status tab was replaced by the VEGA status page, so
nothing reads sysinfo/server anymore. get_db() stays for calendar and
bucketlist.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

firebase_website/__init__.py

@@ -1,35 +1,18 @@
-"""firebase_website — Bot → Firestore sync using the Admin SDK.
+"""firebase_website — Bot → Firestore access using the Admin SDK.
 
 Requires GOOGLE_APPLICATION_CREDENTIALS env var pointing to a service-account JSON.
 
-This package is loaded as a Discord extension purely for lifecycle hooks
-(setup / teardown).  It does not register a Cog — it starts a background
-SysInfoSync task instead.
+Loaded as a Discord extension only so missing credentials fail at startup.
+The calendar and bucketlist cogs use get_db().
 
 Usage from main.py:
     await bot.load_extension("firebase_website")
 """
 ######################################################################
-import logging
-
 from discord.ext import commands
 
 from .config import get_db  # noqa: re‑export for calendar, bucketlist, etc.
-from .sysinfo_sync import SysInfoSync
-
-log = logging.getLogger(__name__)
-
-_sync: SysInfoSync | None = None
 
 
 async def setup(bot: commands.Bot) -> None:
-    global _sync
     get_db()  # fail fast if credentials are missing
-    _sync = SysInfoSync()
-    _sync.start()
-
-
-async def teardown(bot: commands.Bot) -> None:
-    global _sync
-    if _sync is not None:
-        await _sync.stop()