Reinstate io_uring_unregister_eventfd()

When the probe registration was added, this got inadvertently
deleted. Oops...

Fixes: ec0ce0168742 ("Add io_uring_register_probe()")
Fixes: https://github.com/axboe/liburing/issues/86
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed