compositor: remove systemd-notify.h

Systemd notifications support was converted into loadable
module, so systemd-notify.h header is not needed.

Signed-off-by: Egor Starkov <egor.starkov@ge.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
3 files changed