*/*: Maintainer reset for smatsui@karashi.org

Many consecutive timeouts. We thank smatsui for all his efforts and
hope to see him back in the future.

PR: 255256
PR: 255257
PR: 255258 [1]
Approved by: maintainer timeout (smatsui@karashi.org, > 2 months), dbaio (mentor)
Approved by: portmgr (adamw) [1]
Differential Revision: https://reviews.freebsd.org/D30769 [1]