message: API: Remove cleanUserObject in UserController.ts
  All cleanUserObject occurrences have been replaced by user.forUser.
diff: @@ -505,12 +505,4 @@ export class UserController {
  return {result: true};
  });
  }
  -
  - private cleanUserObject(id: string, user: IUserModel, currentUser?: IUser) {
  - user.password = '';
  - if (currentUser._id !== id && (currentUser.role !== <string>'teacher' || currentUser.role !== <string>'admin')) {
  - user.uid = null;
  - }
  - return user.toObject({virtuals: true});
  - }
  }
  