remove unused imports

the_app/database.py

@@ -2,7 +2,7 @@ from typing import AsyncGenerator
 
 from sqlalchemy.exc import SQLAlchemyError
 from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
-from sqlalchemy.orm import declarative_base, sessionmaker
+from sqlalchemy.orm import sessionmaker
 
 from the_app import config