From version 5.0 onward, Watcher is part of X-Pack. For more information, see
Alerting on cluster and index events in the X-Pack Reference.
You use the Watcher delete API to permanently remove a watch.
For example:
DELETE _watcher/watch/my_watch
A successful response looks like this:
{
"_id": "my-watch",
"_version": 8,
"found": true
}