removed unecessary method in tracer
removed unecessary method in tracer

chen0031/htrace,reta/incubator-htrace,reta/incubator-htrace,clehene/incubator-htrace,madrob/incubator-htrace,clehene/incubator-htrace,madrob/incubator-htrace,madrob/incubator-htrace,reta/incubator-htrace,madrob/incubator-htrace,madrob/incubator-htrace,madrob/incubator-htrace,reta/incubator-htrace,chen0031/htrace,apache/incubator-htrace,apache/incubator-htrace,chen0031/htrace,reta/incubator-htrace,clehene/incubator-htrace,apache/incubator-htrace,clehene/incubator-htrace,apache/incubator-htrace,clehene/incubator-htrace,chen0031/htrace,reta/incubator-htrace,clehene/incubator-htrace,madrob/incubator-htrace,apache/incubator-htrace,apache/incubator-htrace,reta/incubator-htrace,apache/incubator-htrace,clehene/incubator-htrace,apache/incubator-htrace