We do not need to depend explicitly on dh-systemd as we have a
versioned debhelper dependency with >= 10~, and lintian on buster for
this .dsc even warns:
> build-depends-on-obsolete-package build-depends: dh-systemd => use debhelper (>= 9.20160709)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>