Back out 868ad6fa8e68 - it left all the buildbots failing.

Unclear to me why it was pushed to begin with.  See issue 11798.
Perhaps it's because regrtest with -R was failing?  Fine, but
that's better than regrtest _always_ failing ;-)

Lib/unittest/suite.py

@@ -66,7 +66,6 @@ class BaseTestSuite(object):
 
     def _removeTestAtIndex(self, index):
         """Stop holding a reference to the TestCase at index."""
-        return
         try:
             self._tests[index] = None
         except TypeError: