Remove unused RDS code

[vladbologa]

Description

Checklist (Definition of Done)

- [ ] Unit and integration tests added
- [ ] Added test description under Test manual
- [ ] Evaluated and added CHANGELOG.md entry if required
- [ ] Documentation added if necessary (i.e. changes to dev setup, test execution, ...)

• CI and all relevant tests are passing
  - [ ] Add the ticket number to the PR title if available, i.e. ROX-12345: ...
  - [ ] Discussed security and business related topics privately. Will move any security and business related topics that arise to private communication channel.

Test manual

CI is sufficient.

# To run tests locally run:
make db/teardown db/setup db/migrate
make ocm/setup OCM_OFFLINE_TOKEN=<ocm-offline-token> OCM_ENV=development
make verify lint binary test test/integration

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kovayur, vladbologa

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