LAKITU: Do not set 'internal' USE flag in sdk

Our chromeos-overlay is empty, and setting the internal USE flag
introduces dependencies on packages in that overlay that we do not have.
Let's unset this USE flag.

BUG=b/181107534
TEST=presubmit
RELEASE_NOTE=None

Change-Id: If9d342f6d36caa812c065a6bd9679b5e82f4db25
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/13111
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
1 file changed