build_packages.sh: Migrate building Chrome to py

Remote execution for building Chrome has migrated to Python so remove it
from this script.

BUG=b:218522022
TEST=cros tryjob -g 3717451 -g 3717106 {trogdor64-full-tryjob,amd64-generic-ubsan-fuzzer-tryjob,arm64-generic-full-tryjob,arm64-full-tryjob,grunt-full-tryjob,majolica-full-tryjob}, CQ

Cq-Depend: chromium:3717451
Change-Id: I9e6a773a9a43869c6f23f23996c9ba300bd78b20
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3717106
Reviewed-by: Ram Chandrasekar <rchandrasekar@google.com>
Commit-Queue: Cindy Lin <xcl@google.com>
Tested-by: Cindy Lin <xcl@google.com>
1 file changed