[src/yamt-kmem]: src Closing old heads

[srcmastr <srcmastr%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3b1baee2c2ce
branches:  yamt-kmem
changeset: 932124:3b1baee2c2ce
user:      srcmastr <srcmastr%NetBSD.org@localhost>
date:      Fri May 01 04:07:51 2020 +0000

description:
Closing old heads