```

refactor(python/sockets): 移除方法中的多余self参数

删除validate_goods_art_no方法中的多余self参数，
使其成为独立函数而非类方法
```

python/sockets/message_handler.py

@@ -112,7 +112,7 @@ def handlerFolderDelete(limit_path, goods_art_no_arrays, is_write_txt_log):
                         time.sleep(0.5)  # 等待0.5秒后重试
     
     return move_folder_array
-def validate_goods_art_no(self, goods_art_no):
+def validate_goods_art_no(goods_art_no):
         """
         验证货号输入是否包含特殊字符
         """