(merge 3.2) Issue #12400: remove unused import
diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index 62d869c..ecd8b09 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -168,7 +168,6 @@
 import os
 import random
 import re
-import io
 import sys
 import time
 import errno