TisonKun opened a new pull request #7050: [hotfix] Follow up FLINK-6046 to clean unused variable URL: https://github.com/apache/flink/pull/7050 ## What is the purpose of the change After FLINK-6046 5ff07e63d1e9a98959e5edf66872222b847d23d5 resolved, we replaced `serializedTaskInformation` and `taskInformationBlobKey` with `taskInformationOrBlobKey`. This pull requests acts as a follow up to clean the unused variables and update document. ## Verifying this change This change is a code cleanup without any test coverage. ## 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 `(Evolving)`: (**no**) - 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**) cc @tillrohrmann @zentol
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