remove operator.div for py3

pandas/tests/indexes/test_numeric.py

@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-import operator
 
 import pytest
 
@@ -163,16 +162,15 @@ def test_divmod_series(self):
         for r, e in zip(result, expected):
             tm.assert_series_equal(r, e)
 
-    @pytest.mark.parametrize('op', [operator.div, operator.truediv])
     @pytest.mark.parametrize('zero', zeros)
-    def test_div_zero(self, zero, op):
+    def test_div_zero(self, zero):
         idx = self.create_index()
 
         expected = Index([np.nan, np.inf, np.inf, np.inf, np.inf],
                          dtype=np.float64)
-        result = op(idx, zero)
+        result = idx / zero
         tm.assert_index_equal(result, expected)
-        ser_compat = op(Series(idx).astype('i8'), np.array(zero).astype('i8'))
+        ser_compat = Series(idx).astype('i8') / np.array(zero).astype('i8')
         tm.assert_series_equal(ser_compat, Series(result))
 
     @pytest.mark.parametrize('zero', zeros)