Always use io.BytesIO/StringIO over six; on all supported Pythons

More forward compatible by slightly reducing unnecessary use of the six
library.

2 files changed, 2 insertions, 2 deletions

diff --git a/dateutil/test/test_parser.py b/dateutil/test/test_parser.py
index fbba303..a8f2211 100644
--- a/dateutil/test/test_parser.py
+++ b/dateutil/test/test_parser.py
@@ -14,7 +14,7 @@ from dateutil.parser import UnknownTimezoneWarning
 from ._common import TZEnvContext
 
 from six import assertRaisesRegex, PY3
-from six.moves import StringIO
+from io import StringIO
 
 import pytest
 
diff --git a/dateutil/test/test_tz.py b/dateutil/test/test_tz.py
index d5fdb8d..16d2bda 100644
--- a/dateutil/test/test_tz.py
+++ b/dateutil/test/test_tz.py
@@ -9,7 +9,7 @@ from datetime import datetime, timedelta
 from datetime import time as dt_time
 from datetime import tzinfo
 from six import PY2
-from six import BytesIO, StringIO
+from io import BytesIO, StringIO
 import unittest
 
 import sys