Update test_json.py

Having observed that GH#39098 works in the current release, allow the test that previously XFAIL'd to run (and pass).  This is done to make CI/CD happy, and has nothing to do with changes otherwise present in this PR.

Signed-off-by: Michael Tiemann <[email protected]>

Author: MichaelTiemannOSC

pandas/tests/extension/json/test_json.py

@@ -356,10 +356,8 @@ def test_groupby_extension_no_sort(self):
         """
         super().test_groupby_extension_no_sort()
 
-    # GH#39098 is now fixed, so we don't need to XFAIL, nor subclass this test
-    # @pytest.mark.xpass(reason="GH#39098: Converts agg result to object")
-    # def test_groupby_agg_extension(self, data_for_grouping):
-    #     super().test_groupby_agg_extension(data_for_grouping)
+    def test_groupby_agg_extension(self, data_for_grouping):
+        super().test_groupby_agg_extension(data_for_grouping)
 
 
 class TestArithmeticOps(BaseJSON, base.BaseArithmeticOpsTests):