maven: Simplify definition of the 'version_artifact' dict
We don't need it to be ordered; and '.keys()' is redundant.
Migrated from D6766 (view on Phabricator)
Staging instance, all changes can be removed at any time
We don't need it to be ordered; and '.keys()' is redundant.
Migrated from D6766 (view on Phabricator)