Per ticket DS-4306, we need to ensure the new REST API allows for EPerson deletion.
Currently, the EPerson delete endpoint exists/works, but only if no "constraints" are found on the deletion. See the code at: https://github.com/DSpace/DSpace/blob/master/dspace-spring-rest/src/main/java/org/dspace/app/rest/repository/EPersonRestRepository.java#L183
Once PR #2229 is merged, we would need to enhance that delete endpoint to ensure deletion occurs, even if the EPerson previously submitted content.
We also need to enhance the corresponding "delete*()" integration tests to ensure all EPerson deletion scenarios are checked. They are in this test class: https://github.com/DSpace/DSpace/blob/master/dspace-spring-rest/src/test/java/org/dspace/app/rest/EPersonRestRepositoryIT.java#L418