Removed unnecassary test

Author: alishobeiri

plotly/tests/test_optional/test_figure_factory.py

@@ -2000,14 +2000,6 @@ def test_valid_color_dict(self):
                                 colormap=color_dict)
 
 
-    def test_valid_index(self):
-        data = pd.DataFrame([[2, 3, 4], [4, 5, 6]],
-                            columns=['a', 'b', 'c'])
-
-        self.assertRaises(KeyError, ff.create_facet_grid, data, 'a', 'b',
-                          color_name='c')
-
-
     def test_valid_colorscale_name(self):
         data = pd.DataFrame([[0, 1, 2], [3, 4, 5]],
                             columns=['a', 'b', 'c'])