TST: Rollback teardown logic in unit env test

tests/unit/test_environment.py

@@ -105,7 +105,7 @@ def test_environment_export_environment_exports_environment_json(
     """
     assert example_spaceport_env.export_environment(filename="environment") == None
     assert os.path.isfile("environment.json")
-    request.addfinalizer(os.remove("environment.json"))
+    os.remove("environment.json")
 
 
 def test_geodesic_coordinate_geodesic_to_utm_converts_coordinate():