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 links:
master branch: http://git.yoctoproject.org/cgit/cgit.cgi/meta-minnow/commit/?id=e3718d24e9d2bbdac00d6f1ebd8cbe2894981e4e
daisy branch : http://git.yoctoproject.org/cgit/cgit.cgi/meta-minnow/commit/?h=daisy&id=90fb1ff4cb919fb269a511a0758af9f1f2d99c59

Signed-off-by: Sujith H <Sujith_Haridasan@mentor.com>