Remove old oslo imports.

Author: PGijsbers

openml/flows/functions.py

@@ -5,7 +5,6 @@
 import re
 import xmltodict
 from typing import Union, Dict
-from oslo_concurrency import lockutils
 
 from ..exceptions import OpenMLCacheException
 import openml._api_calls

openml/tasks/functions.py

@@ -2,13 +2,6 @@
 import io
 import re
 import os
-import warnings
-
-# Currently, importing oslo raises a lot of warning that it will stop working
-# under python3.8; remove this once they disappear
-with warnings.catch_warnings():
-    warnings.simplefilter("ignore")
-    from oslo_concurrency import lockutils
 import xmltodict
 
 from ..exceptions import OpenMLCacheException