[utils][tests][dir2] Remove nose

IPython/utils/tests/test_dir2.py

@@ -1,4 +1,3
-import nose.tools as nt
 from IPython.utils.dir2 import dir2
 
 
@@ -9,12 +8,13 class Base(object):
 
 def test_base():
     res = dir2(Base())
-    assert ('x' in res)
-    assert ('z' in res)
-    assert ('y' not in res)
-    assert ('__class__' in res)
-    nt.assert_equal(res.count('x'), 1)
-    nt.assert_equal(res.count('__class__'), 1)
+    assert "x" in res
+    assert "z" in res
+    assert "y" not in res
+    assert "__class__" in res
+    assert res.count("x") == 1
+    assert res.count("__class__") == 1
+
 
 def test_SubClass():
 
@@ -22,9 +22,9 def test_SubClass():
         y = 2
 
     res = dir2(SubClass())
-    assert ('y' in res)
-    nt.assert_equal(res.count('y'), 1)
-    nt.assert_equal(res.count('x'), 1)
+    assert "y" in res
+    assert res.count("y") == 1
+    assert res.count("x") == 1
 
 
 def test_SubClass_with_trait_names_attr():