[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

tests/test_fix_imports_six.py

@@ -4,7 +4,7 @@
 import unittest
 
 try:
-    from six.moves import tkinter
+    import tkinter
 except ImportError:
     tkinter = None