Remove use of DataFrame.query in tests to remove dependency on numexpr

Author: evanpw

pandas/tests/test_groupby.py

@@ -5144,7 +5144,7 @@ def test_groupby_categorical_two_columns(self):
         for key in [('a', 1), ('b', 2), ('b', 1), ('a', 2)]:
             c, i = key
             result = groups_double_key.get_group(key)
-            expected = test.query('cat == @c & ints == @i')
+            expected = test[(test.cat == c) & (test.ints == i)]
             assert_frame_equal(result, expected)
 
         d = {'C1': [3, 3, 4, 5], 'C2': [1, 2, 3, 4], 'C3': [10, 100, 200, 34]}