去掉错误引用

main_service.py

@@ -1,18 +1,11 @@
 import copy
-from email.policy import default
 import logging
 from functools import wraps
-
-from Demos.mmapfile_demo import page_size
-
-import util.utils
-from logging_config import LOGGING_CONFIG
 from service.cus_vanna_srevice import CustomVanna, QdrantClient, TTLCacheWrapper
 from decouple import config
 import flask
 from util import load_ddl_doc
-
-from flask import Flask, Response, jsonify, request, send_from_directory
+from flask import Flask, Response, jsonify, request
 
 
 logger = logging.getLogger(__name__)