Remove unused asyncio import from auth_service

backend/app/services/auth_service.py

@@ -7,8 +7,6 @@ survive server restarts.
 
 from __future__ import annotations
 
-import asyncio
-from app.utils.async_utils import run_blocking
 import hashlib
 import hmac
 import secrets
@@ -17,6 +15,8 @@ from typing import TYPE_CHECKING
 import bcrypt
 import structlog
 
+from app.utils.async_utils import run_blocking
+
 if TYPE_CHECKING:
     import aiosqlite
 
@@ -72,7 +72,6 @@ async def _check_password(plain: str, hashed: str) -> bool:
     """
     plain_bytes = plain.encode()
     hashed_bytes = hashed.encode()
-    loop = asyncio.get_running_loop()
     return await run_blocking(lambda: bool(bcrypt.checkpw(plain_bytes, hashed_bytes)))