build_packages: Drop special logic for chromeos-config

chromeos-config now no longer uses virtual packages for the bsp
packages, meaning:

- No special logic is required anymore for force rebuilding the
  package -- the subslot dependency on the bsp packages will rebuild
  if necessary.
- We can drop the chromeos-config from the grep in revdep calculation,
  since the dependencies are now fully proper.

BUG=b:197038156
TEST=build_packages --board strongbad

Change-Id: If53b2cafec205c203647b573072c95ce0c87994d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3166798
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Auto-Submit: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
1 file changed