Update src/polymorphic/models.py

Co-authored-by: Copilot <[email protected]>

Author: bckohan

src/polymorphic/models.py

@@ -208,7 +208,7 @@ def accessor_function(self):
                 except KeyError:
                     objects = getattr(model, "_base_objects", model.objects)
                     rel_obj = objects.using(
-                        kwargs.get("using", self._state.db or DEFAULT_DB_ALIAS)
+                        self._state.db or DEFAULT_DB_ALIAS
                     ).get(pk=self.pk)
                     field.set_cached_value(self, rel_obj)
                 return rel_obj