message: fix: remove unused (and problematic in babel) type ReferentModel
diff: import { computed } from '@ember/object';
  -import ModelRegistry from 'ember-data/types/registries/model';
  import { singularize } from 'ember-inflector';
  import OsfModel from './osf-model';
  export type ReferentModelName = 'file' | 'node' | 'preprint' | 'registration' | 'user';
  -export type ReferentModel = ModelRegistry[ReferentModelName];
  export default class GuidModel extends OsfModel {
  @computed('id')
  