Remove redundant import.
Merge branch 'hbase-11339-sweep-tool' of https://github.com/JingchengDu/hbase into hbase-11339-sweep-tool
Merge branch 'hbase-11339-sweep-tool' of https://github.com/JingchengDu/hbase into hbase-11339-sweep-tool
Merge branch 'hbase-11339-sweep-tool' of https://github.com/JingchengDu/hbase into hbase-11339-sweep-tool
Refine the code after merging (could not be compiled)
Refine the code (could not be compiled).