This is a fallout from the change in commit 46c07316f906 ("kern: adopt the cr_gid macro for cr_groups[0] more widely").
It doesn't seem that the content of 'reused_creds' has any practical
effect (it is copied into 'fdi.finh', which is not used to queue nor
send a a message to the deamon), in which case this change boils down to
some code simplification.
Fixes: 46c07316f906 ("kern: adopt the cr_gid macro for cr_groups[0] more widely")
Sponsored by: The FreeBSD Foundation