Remove parso xfail for Python>=3.11

parso 0.8.3 added basic support for Python 3.11 and 3.12 grammars

IPython/core/tests/test_completer.py

@@ -210,11 +210,6 b' class KeyCompletable:'
         return list(self.things)
 
 
[e-mail](
-    sys.version_info >= (3, 11),
-    reason="parso does not support 3.11 yet",
-    raises=NotImplementedError,
-)
 class TestCompleter(unittest.TestCase):
     def setUp(self):
         """