app-contatiners/containerd: remove 2.0.0rc2 ebuild

containerd 2.0 integration is postponed to the next COS milestone
so remove ebuilds in order to prevent accidental usage of newer version.

Files can be restored once the 2.0 is released during the next cos-dev
lifecycle.

BUG=b/317658737
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I804287e7cf562e27c1c953e229b80505c2baa790
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/76720
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Kevin Berry <kpberry@google.com>
6 files changed