build_packages.sh: Migrate and delete script

All logic has been migrated to Python so delete the script.

BUG=b:218522022
TEST=CQ

Cq-Depend: chromium:3696039
Change-Id: Ib25e660b80e2a200e5a02c21bed727fc40488abd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3673120
Commit-Queue: Cindy Lin <xcl@google.com>
Reviewed-by: Ram Chandrasekar <rchandrasekar@google.com>
Tested-by: Cindy Lin <xcl@google.com>
1 file changed