project-lakitu: remove iptables from project-lakitu

This change removes iptables from project-lakitu since iptables
can now again be pulled from portage-stable since the upstream
issue that put iptables in project-lakitu in the first place has
since been resolved. (See b/143164242 for context.)

BUG=b/173158844
TEST=presubmit
RELEASE_NOTE=none

Change-Id: I2af660dfdf74bf402d56c88dfc1839671eb2747c
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/9020
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
15 files changed