修复导入错误，优化不使用的模块

sf_manufacturing/models/stock.py

@@ -1,14 +1,14 @@
 # -*- coding: utf-8 -*-
 import base64
+from collections import defaultdict, namedtuple
 import logging
 import json
+from re import split as regex_split
 from re import findall as regex_findall
 from datetime import datetime, timedelta
-from re import split as regex_split
 import requests
 from odoo import SUPERUSER_ID, _, api, fields, models
 from odoo.tools import float_compare
-from collections import defaultdict, namedtuple
 from odoo.addons.stock.models.stock_rule import ProcurementException
 from odoo.addons.sf_base.commons.common import Common
 from odoo.exceptions import ValidationError, UserError