systemd: This change has been pushed to upstream

These changes are accepted in upstream and merged into
master and daisy branch respectively. Hence we can safely
remove them.

Reference link for upstream:
daisy branch: http://git.yoctoproject.org/cgit/cgit.cgi/meta-minnow/commit/?h=daisy&id=90fb1ff4cb919fb269a511a0758af9f1f2d99c59
master branch: http://git.yoctoproject.org/cgit/cgit.cgi/meta-minnow/commit/?id=e3718d24e9d2bbdac00d6f1ebd8cbe2894981e4e

Signed-off-by: Sujith H <Sujith_Haridasan@mentor.com>