Remove duplicate code

Author: makbigc

pandas/tests/frame/test_quantile.py

@@ -159,11 +159,6 @@ def test_quantile_interpolation_int(self, int_frame):
         q = df.quantile(0.1)
         assert q['A'] == np.percentile(df['A'], 10)
 
-        # test with and without interpolation keyword
-        q1 = df.quantile(0.1)
-        assert q1['A'] == np.percentile(df['A'], 10)
-        tm.assert_series_equal(q, q1)
-
     def test_quantile_multi(self):
         df = DataFrame([[1, 1, 1], [2, 2, 2], [3, 3, 3]],
                        columns=['a', 'b', 'c'])