fix fxcop error CA1801
fix fxcop error CA1801

projectkudu/kudu,EricSten-MSFT/kudu,projectkudu/kudu,shibayan/kudu,shibayan/kudu,EricSten-MSFT/kudu,EricSten-MSFT/kudu,projectkudu/kudu,EricSten-MSFT/kudu,shibayan/kudu,projectkudu/kudu,EricSten-MSFT/kudu,shibayan/kudu,shibayan/kudu,projectkudu/kudu