ctdb-daemon: Don't bother sending CTDB_SRVID_SET_NODE_FLAGS

ctdb-daemon: Don't bother sending CTDB_SRVID_SET_NODE_FLAGS

The code that handles this message is
ctdb_recoverd.c:monitor_handler().  Although it appears to do
something potentially useful, it only logs the flags changes.  All
changes made are to local structures - there are no actual
side-effects.

It used to trigger a takeover run when the DISABLED flag changed.
This was dropped back in commit
662f06de9fdce7b1bc1772a4fbe43de271564917.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
(cherry picked from commit e75256767fffc6a7ac0b97e58737a39c63c8b187)