Removing has_systemd from sysv script

After separating sysv and systemd common code, we forgot cleaning all
systemd dedicated code from sysv init script. This patch removes has_systemd
calls and definition from sysv init script, as this script doesn't in use by
systemd anymore.

Change-Id: Ief9be5503c84e2cf960e722e5097dbdc05b888a6
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/18806
Reviewed-by: Alon Bar-Lev <alonbl@redhat.com>
Reviewed-by: Federico Simoncelli <fsimonce@redhat.com>