fix: pre-commit issue

src/flask_app.py

@@ -5,7 +5,6 @@
 from flask_limiter import Limiter
 from flask_limiter.util import get_remote_address
 from flask_restx import Api, Resource, fields
-
 from utils.retrieval_agent import search_do
 from werkzeug.security import check_password_hash, generate_password_hash