Changes to Deletes a single entity (and all its dependencies) by its modelId.

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 404

added the non-success response with the status 429

added the non-success response with the status 500

the response property errors/items/error_message/messageCode became required for the status 200

api operation id hardDelete_3 removed and replaced with deleteExamAdministration