chroot_version_hooks.d: clean out old chromeos-base/chromeos

Now that our builders aren't pulling in chromeos-base/chromeos to build
binpkgs, people with older chroots are hitting an unresolvable block.
We don't need this package anymore so just unmerge it.

BUG=chromium:329920
TEST=`./run_chroot_version_hooks` removed chromeos-base/chromeos package & from world set from all boards

Change-Id: Ia92ae3c0cd3ec3f95fa1cb5c3fa2d8641b762157
Reviewed-on: https://chromium-review.googlesource.com/195164
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed