Remove obsolete test for dir2 on objects with trait_names

IPython/utils/tests/test_dir2.py

@@ -27,20 +27,6 b' def test_SubClass():'
     nt.assert_equal(res.count('x'), 1)
 
 
-def test_SubClass_with_trait_names_method():
-
-    class SubClass(Base):
-        y = 2
-        def trait_names(self):
-            return ['t', 'umbrella']
-
-    res = dir2(SubClass())
-    assert('trait_names' in res)
-    assert('umbrella' in res)
-    nt.assert_equal(res[-6:], ['t', 'trait_names','umbrella', 'x','y','z'])
-    nt.assert_equal(res.count('t'), 1)
-
-
 def test_SubClass_with_trait_names_attr():
     # usecase: trait_names is used in a class describing psychological classification
 
@@ -56,14 +42,6 b' def test_misbehaving_object_without_trait_names():'
     # dir2 shouldn't raise even when objects are dumb and raise
     # something other than AttribteErrors on bad getattr.
 
-    class BadTraitNames(object):
-        @property
-        def trait_names(self):
-            raise KeyboardInterrupt("This should be caught")
-
-        def some_method(self):
-            pass
-
     class MisbehavingGetattr(object):
         def __getattr__(self):
             raise KeyError("I should be caught")
@@ -75,6 +53,6 b' def test_misbehaving_object_without_trait_names():'
         def __dir__(self):
             return ['some_method']
 
-    for bad_klass in (BadTraitNames, MisbehavingGetattr, SillierWithDir):
+    for bad_klass in (MisbehavingGetattr, SillierWithDir):
         res = dir2(bad_klass())
         assert('some_method' in res)