Kill pants own use of the deprecated goal command.

This pass does not go for docs, just code and scripts.

Testing Done:
Locally:
```console
$ ./build-support/bin/publish_docs.sh -o
$ ./build-support/bin/release.sh -n
```

CI went green here: https://travis-ci.org/pantsbuild/pants/builds/43877791

Bugs closed: 864

Reviewed at https://rbcommons.com/s/twitter/r/1479/
Sync of https://github.com/pantsbuild/pants/commit/b030fbeeeaac0fe4ee1275850c2851ac9c411a9c