Fix unused type warning (#8316)
Fix unused type warning (#8316)


tlby/mxnet,ykim362/mxnet,luoyetx/mxnet,ptrendx/mxnet,TuSimple/mxnet,wangyum/mxnet,luoyetx/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,indhub/mxnet,madjam/mxnet,reminisce/mxnet,leezu/mxnet,jamesliu/mxnet,fullfanta/mxnet,CodingCat/mxnet,navrasio/mxnet,crazy-cat/incubator-mxnet,ForkedReposBak/mxnet,formath/mxnet,ykim362/mxnet,vikingMei/mxnet,szha/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,piiswrong/mxnet,weleen/mxnet,weleen/mxnet,Prasad9/incubator-mxnet,crazy-cat/incubator-mxnet,formath/mxnet,yajiedesign/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,jennyzhang0215/incubator-mxnet,navrasio/mxnet,dmlc/mxnet,tornadomeet/mxnet,jamesliu/mxnet,jiajiechen/mxnet,jermainewang/mxnet,yajiedesign/mxnet,CodingCat/mxnet,fullfanta/mxnet,tlby/mxnet,kkk669/mxnet,leezu/mxnet,sxjscience/mxnet,sxjscience/mxnet,indhub/mxnet,vikingMei/mxnet,madjam/mxnet,TuSimple/mxnet,Northrend/mxnet,vikingMei/mxnet,ptrendx/mxnet,zhreshold/mxnet,eric-haibin-lin/mxnet,precedenceguo/mxnet,reminisce/mxnet,larroy/mxnet,tornadomeet/mxnet,precedenceguo/mxnet,reminisce/mxnet,jermainewang/mxnet,yajiedesign/mxnet,navrasio/mxnet,apache/incubator-mxnet,kkk669/mxnet,TuSimple/mxnet,ykim362/mxnet,luoyetx/mxnet,LinkHS/incubator-mxnet,dmlc/mxnet,kkk669/mxnet,kkk669/mxnet,CodingCat/mxnet,dmlc/mxnet,tornadomeet/mxnet,mbaijal/incubator-mxnet,vikingMei/mxnet,jermainewang/mxnet,indhub/mxnet,solin319/incubator-mxnet,yuruofeifei/mxnet,indhub/mxnet,DickJC123/mxnet,madjam/mxnet,reminisce/mxnet,Northrend/mxnet,solin319/incubator-mxnet,tlby/mxnet,CodingCat/mxnet,jamesliu/mxnet,jennyzhang0215/incubator-mxnet,yuruofeifei/mxnet,szha/mxnet,yuruofeifei/mxnet,leezu/mxnet,ykim362/mxnet,CodingCat/mxnet,ptrendx/mxnet,kkk669/mxnet,jennyzhang0215/incubator-mxnet,szha/mxnet,szha/mxnet,jiajiechen/mxnet,wangyum/mxnet,rahul003/mxnet,Prasad9/incubator-mxnet,leezu/mxnet,solin319/incubator-mxnet,szha/mxnet,zhreshold/mxnet,Prasad9/incubator-mxnet,LinkHS/incubator-mxnet,CodingCat/mxnet,fullfanta/mxnet,eric-haibin-lin/mxnet,sxjscience/mxnet,LinkHS/incubator-mxnet,sxjscience/mxnet,yuruofeifei/mxnet,ptrendx/mxnet,madjam/mxnet,zhreshold/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,Prasad9/incubator-mxnet,hpi-xnor/BMXNet,ptrendx/mxnet,jennyzhang0215/incubator-mxnet,DickJC123/mxnet,jiajiechen/mxnet,Northrend/mxnet,leezu/mxnet,LinkHS/incubator-mxnet,vikingMei/mxnet,crazy-cat/incubator-mxnet,luoyetx/mxnet,vikingMei/mxnet,tlby/mxnet,TuSimple/mxnet,wangyum/mxnet,TuSimple/mxnet,kkk669/mxnet,ykim362/mxnet,piiswrong/mxnet,hpi-xnor/BMXNet,tlby/mxnet,yajiedesign/mxnet,indhub/mxnet,tlby/mxnet,tornadomeet/mxnet,yajiedesign/mxnet,weleen/mxnet,madjam/mxnet,tornadomeet/mxnet,madjam/mxnet,fullfanta/mxnet,jamesliu/mxnet,ykim362/mxnet,navrasio/mxnet,piiswrong/mxnet,reminisce/mxnet,DickJC123/mxnet,crazy-cat/incubator-mxnet,luoyetx/mxnet,wangyum/mxnet,TuSimple/mxnet,yuruofeifei/mxnet,larroy/mxnet,solin319/incubator-mxnet,leezu/mxnet,precedenceguo/mxnet,jermainewang/mxnet,dmlc/mxnet,hpi-xnor/BMXNet,navrasio/mxnet,sxjscience/mxnet,Northrend/mxnet,CodingCat/mxnet,ForkedReposBak/mxnet,ptrendx/mxnet,larroy/mxnet,wangyum/mxnet,jamesliu/mxnet,LinkHS/incubator-mxnet,weleen/mxnet,jennyzhang0215/incubator-mxnet,fullfanta/mxnet,fullfanta/mxnet,hpi-xnor/BMXNet,yuruofeifei/mxnet,solin319/incubator-mxnet,madjam/mxnet,szha/mxnet,formath/mxnet,mbaijal/incubator-mxnet,szha/mxnet,kkk669/mxnet,tlby/mxnet,tlby/mxnet,indhub/mxnet,larroy/mxnet,rahul003/mxnet,indhub/mxnet,formath/mxnet,jermainewang/mxnet,precedenceguo/mxnet,fullfanta/mxnet,ForkedReposBak/mxnet,madjam/mxnet,mbaijal/incubator-mxnet,fullfanta/mxnet,vikingMei/mxnet,wangyum/mxnet,ForkedReposBak/mxnet,Northrend/mxnet,jiajiechen/mxnet,larroy/mxnet,TuSimple/mxnet,weleen/mxnet,eric-haibin-lin/mxnet,Northrend/mxnet,rahul003/mxnet,apache/incubator-mxnet,precedenceguo/mxnet,LinkHS/incubator-mxnet,reminisce/mxnet,Northrend/mxnet,CodingCat/mxnet,piiswrong/mxnet,LinkHS/incubator-mxnet,hpi-xnor/BMXNet,dmlc/mxnet,jamesliu/mxnet,yajiedesign/mxnet,wangyum/mxnet,tornadomeet/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,Prasad9/incubator-mxnet,formath/mxnet,fullfanta/mxnet,weleen/mxnet,zhreshold/mxnet,jermainewang/mxnet,tornadomeet/mxnet,ptrendx/mxnet,ptrendx/mxnet,reminisce/mxnet,jiajiechen/mxnet,mbaijal/incubator-mxnet,luoyetx/mxnet,precedenceguo/mxnet,Northrend/mxnet,mbaijal/incubator-mxnet,hpi-xnor/BMXNet,eric-haibin-lin/mxnet,jennyzhang0215/incubator-mxnet,yuruofeifei/mxnet,zhreshold/mxnet,weleen/mxnet,formath/mxnet,indhub/mxnet,jermainewang/mxnet,crazy-cat/incubator-mxnet,rahul003/mxnet,sxjscience/mxnet,zhreshold/mxnet,crazy-cat/incubator-mxnet,zhreshold/mxnet,jamesliu/mxnet,hpi-xnor/BMXNet,Northrend/mxnet,piiswrong/mxnet,rahul003/mxnet,formath/mxnet,precedenceguo/mxnet,TuSimple/mxnet,indhub/mxnet,yajiedesign/mxnet,larroy/mxnet,wangyum/mxnet,jamesliu/mxnet,wangyum/mxnet,solin319/incubator-mxnet,piiswrong/mxnet,ptrendx/mxnet,navrasio/mxnet,szha/mxnet,kkk669/mxnet,TuSimple/mxnet,dmlc/mxnet,jamesliu/mxnet,jennyzhang0215/incubator-mxnet,navrasio/mxnet,leezu/mxnet,solin319/incubator-mxnet,sxjscience/mxnet,ykim362/mxnet,precedenceguo/mxnet,larroy/mxnet,dmlc/mxnet,vikingMei/mxnet,eric-haibin-lin/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,sxjscience/mxnet,kkk669/mxnet,mbaijal/incubator-mxnet,jiajiechen/mxnet,Prasad9/incubator-mxnet,yuruofeifei/mxnet,leezu/mxnet,szha/mxnet,yajiedesign/mxnet,apache/incubator-mxnet,DickJC123/mxnet,ykim362/mxnet,formath/mxnet,rahul003/mxnet,tornadomeet/mxnet,ForkedReposBak/mxnet,LinkHS/incubator-mxnet,rahul003/mxnet,tlby/mxnet,mbaijal/incubator-mxnet,crazy-cat/incubator-mxnet,dmlc/mxnet,Prasad9/incubator-mxnet,crazy-cat/incubator-mxnet,formath/mxnet,luoyetx/mxnet,crazy-cat/incubator-mxnet,solin319/incubator-mxnet,piiswrong/mxnet,ykim362/mxnet,apache/incubator-mxnet,madjam/mxnet,jennyzhang0215/incubator-mxnet,Prasad9/incubator-mxnet,luoyetx/mxnet,jiajiechen/mxnet,precedenceguo/mxnet,CodingCat/mxnet,navrasio/mxnet,TuSimple/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,vikingMei/mxnet,mbaijal/incubator-mxnet,weleen/mxnet,jiajiechen/mxnet,sxjscience/mxnet,hpi-xnor/BMXNet,solin319/incubator-mxnet,larroy/mxnet,zhreshold/mxnet,luoyetx/mxnet,yuruofeifei/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,piiswrong/mxnet,jermainewang/mxnet,rahul003/mxnet,piiswrong/mxnet,weleen/mxnet,jennyzhang0215/incubator-mxnet,LinkHS/incubator-mxnet,jiajiechen/mxnet,hpi-xnor/BMXNet,navrasio/mxnet,tornadomeet/mxnet,jermainewang/mxnet,Prasad9/incubator-mxnet,ptrendx/mxnet