Refactor the `Record` by removing the schema

[Fokko]

Feature Request / Improvement

The Record class in Typedef should not carry a schema as it does now. This is mostly for testing purposes, but it is very tempting to rely on this schema, while that shouldn't be the case.

[github-actions]

This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.

[github-actions]

This issue has been closed because it has not received any activity in the last 14 days since being marked as 'stale'