remove unused member
remove unused member

yuhangwang/pv,biasmv/pv,CyrusBiotechnology/pv,Traksewt/pv,yuhangwang/pv,biasmv/pv,yuhangwang/pv,Traksewt/pv,biasmv/pv,CyrusBiotechnology/pv,Traksewt/pv,biasmv/pv,Traksewt/pv,CyrusBiotechnology/pv,yuhangwang/pv,CyrusBiotechnology/pv