[jira] [Created] (FLINK-6597) Cleanup WindowOperatorTest useless imports

[Shang Yuanchun (Jira)]

sunjincheng created FLINK-6597:
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             Summary: Cleanup WindowOperatorTest useless imports
                 Key: FLINK-6597
                 URL: https://issues.apache.org/jira/browse/FLINK-6597
             Project: Flink
          Issue Type: Test
            Reporter: sunjincheng
            Assignee: sunjincheng
             Fix For: 1.3.0


Don't miss doing any good thing no matter how insignificant it looks.



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