Removed duplicate tests in ChangeListTests.test_total_ordering_optimization().
@@ -1039,10 +1039,6 @@ class ChangeListTests(TestCase):
(['field', '-other_field'], ['field', '-other_field']),
# Composite unique nullable.
(['-field', 'null_field'], ['-field', 'null_field', '-pk']),
- # Composite unique nullable.
- (['-field', 'null_field'], ['-field', 'null_field', '-pk']),
- # Composite unique nullable.
- (['-field', 'null_field'], ['-field', 'null_field', '-pk']),
# Composite unique and nullable.
(['-field', 'null_field', 'other_field'], ['-field', 'null_field', 'other_field']),
# Composite unique attnames.
