修改coding代码扫描警告

sf_machine_connect/models/ftp_client.py

@@ -3,9 +3,7 @@ import os
 import time
 import json
 import base64
-import shutil
 import logging
-import hashlib
 from io import BytesIO
 from zipfile import ZipFile
 from datetime import datetime, timedelta
@@ -13,8 +11,6 @@ import requests
 from odoo.http import request
 from odoo import fields, models, api, _
 from odoo.exceptions import UserError
-from odoo.exceptions import MissingError
-from odoo.exceptions import ValidationError
 from odoo.addons.sf_machine_connect.models import py2opcua, ftp_operate
 
 _logger = logging.getLogger(__name__)