lib-storage: Don't update mailbox list index status fields when deleting a mailbox.
lib-storage: Don't update mailbox list index status fields when deleting a mailbox.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot