django 3.2: import StringIO from io (#64430)

docbow_project/docbow/unicodecsv.py

@@ -2,7 +2,7 @@
 # Author: simon
 import csv
 from django.utils.encoding import force_str, force_text
-from django.utils.six import StringIO
+from io import StringIO
 
 
 class UnicodeWriter(object):

tests/pfwb/test_pfwb.py

@@ -5,13 +5,13 @@ when you run "manage.py test".
 Replace this with more appropriate tests for your application.
 """
 
+from io import StringIO
 import tempfile
 import sys
 from contextlib import contextmanager
 from functools import wraps
 
 from django.utils.encoding import force_bytes, force_text
-from django.utils.six import StringIO
 
 
 import mock

tests/pw/test_pw.py

@@ -6,13 +6,13 @@ when you run "manage.py test".
 Replace this with more appropriate tests for your application.
 """
 
+from io import StringIO
 import tempfile
 import sys
 from contextlib import contextmanager
 from functools import wraps
 
 from django.utils.encoding import force_bytes, force_text
-from django.utils.six import StringIO
 
 MEDIA_ROOT = tempfile.mkdtemp()