Delete a Retrospective Process Group

curl --request DELETE \
  --url https://api.rootly.com/v1/retrospective_process_groups/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "258dbd8a-f3c1-4817-bdd0-001e734ef964",
    "type": "retrospective_process_groups",
    "attributes": {
      "retrospective_process_id": "29e22d3d-b104-4fc8-95d1-f93a03bdeedd",
      "sub_status_id": "06986d82-cced-4c7e-901e-3307e4c07319",
      "position": 1,
      "updated_at": "2026-01-09T17:15:38.783-08:00",
      "created_at": "2026-01-09T17:15:38.154-08:00"
    },
    "relationships": {
      "retrospective_process_group_steps": {
        "data": []
      }
    }
  }
}