Remove legacy logic for Python 3.7.

Author: jaraco

tests/test_py39compat.py

@@ -14,8 +14,7 @@
 
 class OldStdlibFinderTests(fixtures.DistInfoPkgOffPath, unittest.TestCase):
     def setUp(self):
-        python_version = sys.version_info[:2]
-        if python_version < (3, 8) or python_version > (3, 9):
+        if sys.version_info >= (3, 10):
             self.skipTest("Tests specific for Python 3.8/3.9")
         super().setUp()