Remove xfail now that test passes. Ref #4371.

Author: jaraco

setuptools/tests/test_editable_install.py

@@ -396,11 +396,6 @@ def test_namespace_accidental_config_in_lenient_mode(self, venv, tmp_path):
         assert "mypkg.other not defined" in out
 
 
-# Moved here from test_develop:
-@pytest.mark.xfail(
-    platform.python_implementation() == 'PyPy',
-    reason="Workaround fails on PyPy (why?)",
-)
 def test_editable_with_prefix(tmp_path, sample_project, editable_opts):
     """
     Editable install to a prefix should be discoverable.