Drop stale cross-reference comment from aio/connection.py

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

Author: antoineleclair

src/dqlitedbapi/aio/connection.py

@@ -44,7 +44,7 @@ def __init__(
         # run on. We instantiate lazily in _ensure_connection / the
         # op-serializing paths so constructors can safely run outside
         # a running loop (SQLAlchemy creates AsyncConnection in sync
-        # glue code before any loop exists). See ISSUE-11.
+        # glue code before any loop exists).
         self._connect_lock: asyncio.Lock | None = None
         self._op_lock: asyncio.Lock | None = None