Deleting stale hooks that have been commented out for years and are anyway not desirable

Change-Id: Ie8af4d354a9b4c61c04b16bb84ae452b40e1b5d6
Reviewed-on: http://review.couchbase.org/37953
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>