make_chroot: drop old pbzip2 check

Now that we use our own SDKs, we can assume the default setting works.

BUG=b:191307774
TEST=`cros_sdk` still works

Change-Id: Idfff0be9efab3ddc1f62de7be3bb0e2aac7dfc81
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2985361
Reviewed-by: Alex Klein <saklein@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed