Use `Status` `Enum` in `remove_worker`
Looks like this can use the `Status` `Enum`, which we already use
elsewhere. So make use of it here too.
@@ -2303,7 +2303,7 @@ class Scheduler(ServerNode):
self.idle.discard(ws)
self.saturated.discard(ws)
del self.workers[address]
- ws.status = "closed"
+ ws.status = Status.closed
self.total_occupancy -= ws.occupancy
recommendations = {}
