migration/multifd: Make multifd_channel_connect() return void

It never fails, drop the retval and also the Error**.

Suggested-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240222095301.171137-4-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
1 file changed