adapter.http: simplify SubmodelElement deletion

We can always call `_get_submodel_or_nested_submodel_element`, as it
returns the submodel itself if we don't pass it any id_shorts.

basyx/aas/adapter/http.py

@@ -767,12 +767,10 @@ def delete_submodel_submodel_elements_id_short_path(self, request: Request, url_
  submodel = self._get_obj_ts(url_args["submodel_id"], model.Submodel)
  submodel.update()
  id_short_path: List[str] = url_args["id_shorts"]
- parent: model.UniqueIdShortNamespace = submodel
- if len(id_short_path) > 1:
- parent = self._expect_namespace(
- self._get_nested_submodel_element(submodel, id_short_path[:-1]),
- id_short_path[-1]
- )
+ parent: model.UniqueIdShortNamespace = self._expect_namespace(
+ self._get_submodel_or_nested_submodel_element(submodel, id_short_path[:-1]),
+ id_short_path[-1]
+ )
  self._namespace_submodel_element_op(parent, parent.remove_referable, id_short_path[-1])
  return response_t()