Remove worker version
In PR https://github.com/huggingface/datasets-server/pull/916, `job_runner_version` new field was created in order to version `JobRunner` with int instead of string. Now that we have all the logic depending on the new field `worker_version` is no more needed.
Remove worker version: In PR https://github.com/huggingface/datasets-server/pull/916, `job_runner_version` new field was created in order to version `JobRunner` with int instead of string. Now that we have all the logic depending on the new field `worker_version` is no more needed.