Genmao Yu created SPARK-19251:
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Summary: remove unused imports and outdated comments
Key: SPARK-19251
URL: https://issues.apache.org/jira/browse/SPARK-19251
Project: Spark
Issue Type: Improvement
Components: DStreams, GraphX, MLlib, Spark Core, SQL
Affects Versions: 2.1.0
Reporter: Genmao Yu
Priority: Minor
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