skip timezone tests that fail in test collection

Author: mattip

pandas/tests/tools/test_to_datetime.py

@@ -613,6 +613,7 @@ def test_to_datetime_mixed_date_and_string(self, format):
         expected = DatetimeIndex(["2020-01-01", "2020-01-02"])
         tm.assert_index_equal(res, expected)
 
+    @pytest.mark.skipif(tm.IS_PYPY, reason="PyPy crashes when creating DatimeIndex with timezone")
     @pytest.mark.parametrize(
         "fmt",
         ["%Y-%d-%m %H:%M:%S%z", "%Y-%m-%d %H:%M:%S%z"],