project-edgeos: Delete fork of systemd.

The custom patches have been put in project-lakitu.

BUG=b/180686339
TEST=none
RELEASE_NOTE=none

Change-Id: I248799e80c7ffd0121112f4b0c9d4d6e23c9c78a
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/22071
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Roy Yang <royyang@google.com>
27 files changed