in ScriptRunner for Jira Cloud how to remove or delete a watcher?

[Xstpeach Store]

Edit: I figured it out. This works (with hard coded accountId):

def watcherDel = delete("/rest/api/3/issue/${issueKey}/watchers?accountId=712020:18801fc1-077f-4132-ac7f-928139298d2c")
.header('Content-Type', 'application/json')