message: API: Remove unused BadRequestError import
diff: import {
  BodyParam, Post, Param, JsonController, UseBefore, Authorized, CurrentUser,
  - InternalServerError, ForbiddenError, BadRequestError
  + InternalServerError, ForbiddenError
  } from 'routing-controllers';
  import passportJwtMiddleware from '../security/passportJwtMiddleware';
  import {IUser} from '../../../shared/models/IUser';
  