Please tell me how to delete a shutdown bookie.
``` 20:55:24.286 [main] INFO org.apache.bookkeeper.client.BookKeeperAdmin - Count of Ledgers which need to be rereplicated: 1 20:55:34.289 [main] INFO org.apache.bookkeeper.client.BookKeeperAdmin - Count of Ledgers which need to be rereplicated: 1 20:55:44.292 [main] INFO org.apache.bookkeeper.client.BookKeeperAdmin - Count of Ledgers which need to be rereplicated: 1 20:55:54.295 [main] INFO org.apache.bookkeeper.client.BookKeeperAdmin - Count of Ledgers which need to be rereplicated: 1 20:56:04.299 [main] INFO org.apache.bookkeeper.client.BookKeeperAdmin - Count of Ledgers which need to be rereplicated: 1 ```
