/**
  * Deletes a contributor by ID.
  *
  * @param id the id of the contributor to delete.
  */
 @RequestMapping(value = "v1/contributors/{id}", method = RequestMethod.DELETE)
 public @ResponseBody @PreAuthorize("hasRole('ROLE_ADMINS')") void removeContributor(
     @PathVariable("id") String id) {
   service.delete(id);
 }