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remove this small orphaned stuff: https://github.com/apache/hive/blob/57c15936d7a69e215c986d62aa959e70cb352da4/ql/src/java/org/apache/hadoop/hive/ql/exec/DagUtils.java and place method to https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/DagUtils.java
GitHub Pull Request #4756