Try removing flaky xfail test (#1439)

Author: sydney-runkle

tests/validators/test_complex.py

@@ -1,6 +1,7 @@
 import math
 import platform
 import re
+import sys
 
 import pytest
 
@@ -84,7 +85,7 @@ def test_complex_strict(input_value, expected):
 
 
 @pytest.mark.xfail(
-    platform.python_implementation() == 'PyPy',
+    platform.python_implementation() == 'PyPy' and sys.version_info < (3, 10),
     reason='PyPy cannot process this string due to a bug, even if this string is considered valid in python',
 )
 def test_valid_complex_string_with_space():