Remove xfail from taint_over_list_models with CSVSA

It now works, for reasons I don't understand.

Author: Owen Jones

regression/end_to_end/taint_over_list_models/test_taint_over_list_models.py

@@ -7,9 +7,6 @@
 import regression.utils as utils
 
 
-# This test also crashes with the full-slicer on
-@pytest.mark.xfail("SECURITY_REGRESSION_TESTS_USE_CSVSA" in os.environ,
-                   strict=True, reason="Zero traces found with CSVSA")
 @fasteners.interprocess_locked(os.path.join(os.path.dirname(__file__), ".build_lock"))
 def test_taint_over_list_models():
     with utils.working_dir(os.path.abspath(os.path.dirname(__file__))):