Issue #21741: Update 147 test modules to use test discovery.

I have compared output between pre- and post-patch runs of these tests
to make sure there's nothing missing and nothing broken, on both
Windows and Linux.  The only differences I found were actually tests
that were previously *not* run.

1 files changed, 2 insertions, 6 deletions

diff --git a/Lib/test/test_class.py b/Lib/test/test_class.py
index fcac5c5ea9..6036e36032 100644
--- a/Lib/test/test_class.py
+++ b/Lib/test/test_class.py
@@ -2,7 +2,6 @@
 
 import unittest
 
-from test import support
 
 testmeths = [
 
@@ -569,8 +568,5 @@ class ClassTests(unittest.TestCase):
         a = A(hash(A.f)^(-1))
         hash(a.f)
 
-def test_main():
-    support.run_unittest(ClassTests)
-
-if __name__=='__main__':
-    test_main()
+if __name__ == '__main__':
+    unittest.main()