remove 'foo' and other print msg from test (#16088)
remove 'foo' and other print msg from test (#16088)

* remove 'foo' and other print msg from test

* address review comment

* re-trigger CI

szha/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,szha/mxnet,apache/incubator-mxnet,zhreshold/mxnet,tlby/mxnet,leezu/mxnet,larroy/mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,szha/mxnet,zhreshold/mxnet,apache/incubator-mxnet,zhreshold/mxnet,zhreshold/mxnet,zhreshold/mxnet,DickJC123/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,zhreshold/mxnet,larroy/mxnet,tlby/mxnet,leezu/mxnet,sxjscience/mxnet,sxjscience/mxnet,szha/mxnet,sxjscience/mxnet,sxjscience/mxnet,apache/incubator-mxnet,leezu/mxnet,larroy/mxnet,szha/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,DickJC123/mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,tlby/mxnet,tlby/mxnet,ForkedReposBak/mxnet,tlby/mxnet,sxjscience/mxnet,leezu/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,leezu/mxnet,ForkedReposBak/mxnet,eric-haibin-lin/mxnet,tlby/mxnet,ForkedReposBak/mxnet,szha/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,yajiedesign/mxnet,larroy/mxnet,szha/mxnet,apache/incubator-mxnet,larroy/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,DickJC123/mxnet,eric-haibin-lin/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,tlby/mxnet,larroy/mxnet,tlby/mxnet,ForkedReposBak/mxnet,tlby/mxnet,szha/mxnet,szha/mxnet,larroy/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,sxjscience/mxnet,larroy/mxnet,sxjscience/mxnet,leezu/mxnet,DickJC123/mxnet,leezu/mxnet,leezu/mxnet,zhreshold/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,zhreshold/mxnet,sxjscience/mxnet,leezu/mxnet