Remove unused function.
Don't take IDs in from POST on badge routes.

We used to require systemId, issuerId or programId on POST when the
badge routes were just `/badges/*` but since we have changed to
including the full parentage of the badge in the route, we can pull this
information without having to rely on user input.
Merge pull request #25 from mozilla/24-relationships

Implement relationships [closes #24]
WIP full publish
Small tweaks to support new badgekit-issue-client
Fixing missing comma in package.json
Changes based on review