Github user qiuchenjian commented on the issue:
https://github.com/apache/carbondata/pull/3036
@xuchuanyin @xubo245 @QiangCai @jackylk Can we enable checkstyle rule
of avoiding unused importsï¼i think it's necessary to keep good code style and
reduce the dependency of a class on the number of jar packages, the rule may
be is <module name="UnusedImports"/>---
