/<instance_id>/links/{link_id}/image - DELETE

{
  "code": 401,
  "details": "The server could not verify that you are authorized to access the URL requested.  You either supplied the wrong credentials (e.g. a bad password), or your browser doesn't understand how to supply the credentials required.",
  "message": "Unauthorized",
  "status": "error"
}

{
  "code": 404,
  "details": "Invalid id '123456'",
  "message": "Not Found",
  "status": "error"
}