message: Change UnitController DELETE response to {}
diff: @@ -177,12 +177,10 @@ export class UnitController {
  *
  * @apiParam {String} id Unit ID.
  *
  - * @apiSuccess {Boolean} result Confirmation of deletion.
  + * @apiSuccess {Object} result Empty object.
  *
  * @apiSuccessExample {json} Success-Response:
  - * {
  - * "result": true
  - * }
  + * {}
  *
  * @apiError NotFoundError
  * @apiError ForbiddenError
  @@ -194,7 +192,7 @@ export class UnitController {
  await Lecture.updateMany({}, {$pull: {units: id}});
  await unit.remove();
  - return {result: true};
  + return {};
  }
  protected pushToLecture(lectureId: string, unit: any) {
  