feat(deposits): remove /v1/deposits endpoint and, docs
DO NOT DEPLOY YET!
- remove /v1/deposits, /deposits and /v1.0/deposits
- remove from swagger spec
- serve up 404 with well formatted message including link to Crossref deprecation page
- remove dependency on Mongo, environment variables: MONGO_HOST, MONGO_USERNAME, MONGO_PASSWORD
BREAKING CHANGE: CR-1159