docs: 更新文档

src/heurams/services/attic.py

@@ -3,7 +3,6 @@ import pickle as pkl
 from heurams.services.logger import get_logger
 from heurams.context import config_var
 from pathlib import Path
-from heurams.services.hasher import get_md5
 import atexit
 from heurams.services import timer
 from heurams.services.exceptions import WTFException

src/heurams/services/hasher.py

@@ -1,6 +1,5 @@
 # 哈希服务
 import hashlib
-import random
 from heurams.services.logger import get_logger
 
 logger = get_logger(__name__)