Revert "[1.7.x] Fixed #22331 -- Fixed migrations ProjectState to ignore unmanaged models."

        "Takes in an Apps and returns a ProjectState matching it"

        app_models = {}

        for model in apps.get_models():

            if model._meta.managed:

            model_state = ModelState.from_model(model)

            app_models[(model_state.app_label, model_state.name.lower())] = model_state

        return cls(app_models)

                verbose_name = "tome"

                db_table = "test_tome"

        class Unmanaged(models.Model):

            title = models.CharField(max_length=1000)

            class Meta:

                app_label = "migrations"

                apps = new_apps

                managed = False

        project_state = ProjectState.from_apps(new_apps)

        author_state = project_state.models['migrations', 'author']

        author_proxy_state = project_state.models['migrations', 'authorproxy']

        sub_author_state = project_state.models['migrations', 'subauthor']

        book_state = project_state.models['migrations', 'book']

        # unmanaged models should not appear in migrations

        with self.assertRaises(KeyError):

            project_state.models['migrations', 'unmanaged']

        self.assertEqual(author_state.app_label, "migrations")

        self.assertEqual(author_state.name, "Author")