Discard now redundant parts of a failing test

Author: kernc

pandas/tests/sparse/test_frame.py

@@ -441,7 +441,6 @@ def test_set_value(self):
         with tm.assert_produces_warning(FutureWarning,
                                         check_stacklevel=False):
             res = self.frame.set_value('foobar', 'B', 1.5)
-        assert res is not self.frame
         assert res.index[-1] == 'foobar'
         with tm.assert_produces_warning(FutureWarning,
                                         check_stacklevel=False):
@@ -450,9 +449,8 @@ def test_set_value(self):
         with tm.assert_produces_warning(FutureWarning,
                                         check_stacklevel=False):
             res2 = res.set_value('foobar', 'qux', 1.5)
-        assert res2 is not res
         tm.assert_index_equal(res2.columns,
-                              pd.Index(list(self.frame.columns) + ['qux']))
+                              pd.Index(list(self.frame.columns)))
         with tm.assert_produces_warning(FutureWarning,
                                         check_stacklevel=False):
             assert res2.get_value('foobar', 'qux') == 1.5