## What is the purpose of the change This PR is based on #6748 and #6751 and is part of the [removal of Flink's legacy mode](https://issues.apache.org/jira/browse/FLINK-10392).
Removes the CoreOptions#MODE option used to switch between the new and legacy mode. ## Brief change log - Remove `CoreOptions#MODE`, `CoreOptions#NEW` and `CoreOptions#LEGACY` - Set the mode where it was switchable to new (e.g. `isNewMode = true` in `YarnTestBase`) ## Verifying this change - Not explicitly tested ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes) - The serializers: (no) - The runtime per-record code paths (performance sensitive): (no) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no) - The S3 file system connector: (no) ## Documentation - Does this pull request introduce a new feature? (no) - If yes, how is the feature documented? (not applicable) [ Full content available at: https://github.com/apache/flink/pull/6752 ] This message was relayed via gitbox.apache.org for [email protected]
