fixup: remove remove unused alias in code

testing/example_scripts/unittest/test_setup_skip_class.py

@@ -1,6 +1,8 @@
 # mypy: allow-untyped-defs
 """Skipping an entire subclass with unittest.skip() should *not* call setUpClass from a base class."""
 
+from __future__ import annotations
+
 import unittest