Remove blank line

Author: efimov-mikhail

Lib/test/test_stackrefs.py

@@ -40,7 +40,6 @@ def run_with_refcount_check(self, func, obj):
                 self.assertGreater(refcount, self.BIG_REFCOUNT)
                 self.assertIn(flags, (1, -1))
                 results.add((refcount, flags))
-
             self.assertEqual(len(results), 1)
 
         mortal_objs = (object(), range(10), iter([1, 2, 3]))