DELETE /api/fleet/proxies/{itemId}
curl \ --request DELETE 'https://<KIBANA_URL>/api/fleet/proxies/{itemId}' \ --header "Authorization: $API_KEY" \ --header "kbn-xsrf: true"
curl \ --request DELETE 'https://<KIBANA_URL>/api/fleet/proxies/{itemId}' \ --header "Authorization: $API_KEY" \ --header "kbn-xsrf: true"