remove useless code
remove useless code

lshmouse/rDSN,goksyli/rDSN,glglwty/rDSN,lshmouse/rDSN,imzhenyu/rDSN,pandaworrior/rDSN,imzhenyu/rDSN,qinzuoyan/rDSN,Microsoft/rDSN,Microsoft/rDSN,qinzuoyan/rDSN,glglwty/rDSN,shengofsun/rDSN,pandaworrior/rDSN,imzhenyu/rDSN,ykwd/rDSN,ykwd/rDSN,Microsoft/rDSN,mcfatealan/rDSN,lshmouse/rDSN,ykwd/rDSN,pandaworrior/rDSN,mcfatealan/rDSN,whiker/rDSN,mcfatealan/rDSN,whiker/rDSN,pandaworrior/rDSN,goksyli/rDSN,linearregression/rDSN,mkhoeini/rDSN,pandaworrior/rDSN,qinzuoyan/rDSN,glglwty/rDSN,goksyli/rDSN,qinzuoyan/rDSN,qinzuoyan/rDSN,shengofsun/rDSN,whiker/rDSN,Microsoft/rDSN,shengofsun/rDSN,lshmouse/rDSN,whiker/rDSN,shengofsun/rDSN,glglwty/rDSN,imzhenyu/rDSN,mcfatealan/rDSN,linearregression/rDSN,mkhoeini/rDSN,shengofsun/rDSN,goksyli/rDSN,shengofsun/rDSN,whiker/rDSN,shengofsun/rDSN,mkhoeini/rDSN,imzhenyu/rDSN,shengofsun/rDSN,qinzuoyan/rDSN,lshmouse/rDSN,ykwd/rDSN,qinzuoyan/rDSN,qinzuoyan/rDSN,lshmouse/rDSN,linearregression/rDSN,lshmouse/rDSN,imzhenyu/rDSN,Microsoft/rDSN,Microsoft/rDSN,linearregression/rDSN,imzhenyu/rDSN,lshmouse/rDSN,Microsoft/rDSN,glglwty/rDSN,imzhenyu/rDSN,mkhoeini/rDSN,ykwd/rDSN,Microsoft/rDSN