Minor simplifications in ci/build.py (#10496)
Minor simplifications in ci/build.py (#10496)


TuSimple/mxnet,sxjscience/mxnet,tlby/mxnet,fullfanta/mxnet,rahul003/mxnet,navrasio/mxnet,ptrendx/mxnet,TuSimple/mxnet,szha/mxnet,sxjscience/mxnet,szha/mxnet,jamesliu/mxnet,rahul003/mxnet,precedenceguo/mxnet,tlby/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,sxjscience/mxnet,zhreshold/mxnet,reminisce/mxnet,precedenceguo/mxnet,indhub/mxnet,yajiedesign/mxnet,rahul003/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,tlby/mxnet,dmlc/mxnet,zhreshold/mxnet,larroy/mxnet,leezu/mxnet,larroy/mxnet,tlby/mxnet,TuSimple/mxnet,tlby/mxnet,rahul003/mxnet,dmlc/mxnet,fullfanta/mxnet,navrasio/mxnet,apache/incubator-mxnet,dmlc/mxnet,larroy/mxnet,mbaijal/incubator-mxnet,leezu/mxnet,navrasio/mxnet,eric-haibin-lin/mxnet,szha/mxnet,rahul003/mxnet,precedenceguo/mxnet,reminisce/mxnet,szha/mxnet,szha/mxnet,leezu/mxnet,szha/mxnet,luoyetx/mxnet,ForkedReposBak/mxnet,fullfanta/mxnet,precedenceguo/mxnet,precedenceguo/mxnet,mbaijal/incubator-mxnet,DickJC123/mxnet,apache/incubator-mxnet,ptrendx/mxnet,luoyetx/mxnet,ptrendx/mxnet,yajiedesign/mxnet,fullfanta/mxnet,larroy/mxnet,ForkedReposBak/mxnet,fullfanta/mxnet,tlby/mxnet,indhub/mxnet,TuSimple/mxnet,reminisce/mxnet,navrasio/mxnet,indhub/mxnet,dmlc/mxnet,ForkedReposBak/mxnet,tlby/mxnet,precedenceguo/mxnet,fullfanta/mxnet,larroy/mxnet,TuSimple/mxnet,precedenceguo/mxnet,zhreshold/mxnet,luoyetx/mxnet,fullfanta/mxnet,tlby/mxnet,zhreshold/mxnet,ForkedReposBak/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,larroy/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,indhub/mxnet,jamesliu/mxnet,zhreshold/mxnet,rahul003/mxnet,navrasio/mxnet,tlby/mxnet,TuSimple/mxnet,dmlc/mxnet,luoyetx/mxnet,ptrendx/mxnet,mbaijal/incubator-mxnet,ForkedReposBak/mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,TuSimple/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,leezu/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,dmlc/mxnet,jamesliu/mxnet,leezu/mxnet,luoyetx/mxnet,ptrendx/mxnet,zhreshold/mxnet,precedenceguo/mxnet,indhub/mxnet,mbaijal/incubator-mxnet,dmlc/mxnet,reminisce/mxnet,TuSimple/mxnet,DickJC123/mxnet,leezu/mxnet,reminisce/mxnet,larroy/mxnet,ptrendx/mxnet,precedenceguo/mxnet,yajiedesign/mxnet,szha/mxnet,jamesliu/mxnet,ptrendx/mxnet,luoyetx/mxnet,apache/incubator-mxnet,rahul003/mxnet,jamesliu/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,indhub/mxnet,jamesliu/mxnet,ptrendx/mxnet,reminisce/mxnet,reminisce/mxnet,yajiedesign/mxnet,fullfanta/mxnet,fullfanta/mxnet,luoyetx/mxnet,sxjscience/mxnet,reminisce/mxnet,luoyetx/mxnet,tlby/mxnet,larroy/mxnet,sxjscience/mxnet,mbaijal/incubator-mxnet,luoyetx/mxnet,mbaijal/incubator-mxnet,DickJC123/mxnet,navrasio/mxnet,yajiedesign/mxnet,reminisce/mxnet,szha/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,zhreshold/mxnet,TuSimple/mxnet,zhreshold/mxnet,navrasio/mxnet,ptrendx/mxnet,zhreshold/mxnet,leezu/mxnet,ptrendx/mxnet,indhub/mxnet,sxjscience/mxnet,sxjscience/mxnet,jamesliu/mxnet,rahul003/mxnet,indhub/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,jamesliu/mxnet,TuSimple/mxnet,navrasio/mxnet,eric-haibin-lin/mxnet,szha/mxnet,jamesliu/mxnet,indhub/mxnet,leezu/mxnet,yajiedesign/mxnet,larroy/mxnet,DickJC123/mxnet,ForkedReposBak/mxnet,navrasio/mxnet,apache/incubator-mxnet,ForkedReposBak/mxnet