project-lakitu: remove ebuild for linux 4.19

BUG=b/182503212
TEST=presubmit
RELEASE_NOTE=None

Change-Id: If805671be2e53e81a096d719048595c0e076cf1a
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/15512
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
8 files changed