How can I remove an unnecessary .sujournal file?

[Bob Willcox]

I copied all of the files from a ufs /usr/src filesystem to a zfs filesystem
and don't need/use the .sujournal file that got copied over as well.

So, my quesiton is, how can I remove this unnecessary .sujournal file? When I
attempt a simple rm here's what I get:

root at vader:2 /usr/src> rm .sujournal 
override r--------  root/wheel schg,sunlnk,nodump for .sujournal? y
rm: .sujournal: Operation not permitted

Thanks,
Bob

-- 
Bob Willcox    | Men who cherish for women the highest
bob at immure.com | respect are seldom popular with them.
Austin, TX     |         -- Joseph Addison