Clean vestigial svn:mergeinfo from stable/10 -> releng/10.1
branch.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

git-svn-id: svn://svn.freebsd.org/base/releng/10.1@272462 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f

Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

git-svn-id: svn://svn.freebsd.org/base/releng/10.1@272461 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f