drop support for X We aren't using X anywhere in the system anymore, so drop all the scripts/logic that only works with it. BUG=chromium:842060 TEST=precq passes Change-Id: I63b591fa0daf190e43b3d749377bffdcad8789d3 Reviewed-on: https://chromium-review.googlesource.com/1055307 Commit-Ready: Mike Frysinger <[email protected]> Tested-by: Mike Frysinger <[email protected]> Reviewed-by: Chung-yih Wang <[email protected]>