[jira] [Created] (FLINK-4758) Remove IOReadableWritable from classes where not needed

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-4758:
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             Summary: Remove IOReadableWritable from classes where not needed
                 Key: FLINK-4758
                 URL: https://issues.apache.org/jira/browse/FLINK-4758
             Project: Flink
          Issue Type: Sub-task
          Components: Core
    Affects Versions: 1.2.0
            Reporter: Stephan Ewen
             Fix For: 2.0.0


Many classes implement for historic reasons the {{IOReadableWritable}} interface, where it is not needed any more.



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