simpler test skipping approach

Author: andremcorreia

pandas/tests/extension/test_masked.py

@@ -306,11 +306,9 @@ def check_reduce_groupby(self, ser: pd.Series, op_name: str, skipna: bool):
         if (
             op_name == "prod"
             and skipna
-            and data.dtype.itemsize < 8
-            and np.intp().itemsize < 8
         ):
             pytest.mark.xfail(
-                reason=f"{op_name} with itemsize {data.dtype.itemsize} overflows"
+                reason=f"{op_name} overflows"
             )
 
         if not skipna and ser.isna().any() and op_name != "skew":