test: Revert related_model assert_types

These weren't passing mypy, reverting for now

Author: kdmccormick

tests/openedx_django_lib/test_typing.py

@@ -13,23 +13,15 @@ def test_get_model_id() -> None:
     Test that get_model_id behaves as expected, both at runtime and during typechecking.
     """
     my_model = MyTypedModel()
-    related_model = RelatedTypedModel(my_model=my_model)
 
     # Sanity checks
     assert_type(my_model, MyTypedModel)
     assert_type(my_model.id, MyTypedModel.ID)
-    assert_type(related_model.my_model, MyTypedModel)
-    assert_type(related_model.my_model.id, MyTypedModel.ID)
-    assert_type(related_model.my_model_id, MyTypedModel.ID)
 
     # get_model_id on a model returns its id
     assert get_model_id(my_model) == my_model.id
     assert_type(get_model_id(my_model), MyTypedModel.ID)
-    assert get_model_id(related_model.my_model) == my_model.id
-    assert_type(get_model_id(related_model.my_model), MyTypedModel.ID)
 
     # get_model_id on an id returns itself
     assert get_model_id(my_model.id) == my_model.id
     assert_type(get_model_id(my_model.id), MyTypedModel.ID)
-    assert get_model_id(related_model.my_model.id) == my_model.id
-    assert_type(get_model_id(related_model.my_model.id), MyTypedModel.ID)