We now track explicit tarball base names at a top level under
repository-settings instead of per release. The only time it should be
needed per release is if a project changes their package name part way
through the cycle.
Since most teams are now publishing to pypi and have worked through
needing to rename their packages, it should be safe to update
new-release to not include the tarball-base override per individual
project in a release.
Change-Id: If1c77e358b48113a7fb4d7a48ed8d31841ab9419
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>
68f7c558b9