build_packages.sh: Migrate logic up to setup_board

Remove non-root user check, modify cpu governor, clear shadowlocks,
and log PORTAGE_BINHOST since they have moved to Python.

BUG=b:218521368
TEST=CQ

Cq-Depend: chromium:3533026
Change-Id: I906bee0366377eb532f4f8ac84e03c33ded801f8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3533556
Reviewed-by: Ram Chandrasekar <rchandrasekar@google.com>
Tested-by: Cindy Lin <xcl@google.com>
Commit-Queue: Cindy Lin <xcl@google.com>
1 file changed