make_chroot: drop old bootstrap logic

When we used old Gentoo stage3 images, we had to do more work to get
it into a good state.  Since we're bootstrapping ourselves now, we
can assume the existing version is already up-to-date and has these
base set of packages.

BUG=None
TEST=`cros_sdk --bootstrap` works

Change-Id: I3422400c5777b0990097acc02802f36648adf345
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2208305
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed