remove notebook/worker-image prefetch (#6481)
remove notebook/worker-image prefetch (#6481)


danking/hail,hail-is/hail,cseed/hail,hail-is/hail,danking/hail,danking/hail,danking/hail,hail-is/hail,cseed/hail,danking/hail,cseed/hail,hail-is/hail,danking/hail,hail-is/hail,danking/hail,danking/hail,hail-is/hail,cseed/hail,hail-is/hail,cseed/hail,hail-is/hail,cseed/hail,cseed/hail,cseed/hail