Remove line telling readers to write their own docker-enter
Remove line telling readers to write their own docker-enter

BWITS/nsenter,dalanlan/nsenter,Yong-Lee/nsenter,Yong-Lee/nsenter,ccortezb/nsenter,aaam/nsenter,ccortezb/nsenter,oouyang/nsenter,jasonchaffee/nsenter,jpetazzo/nsenter,jasonchaffee/nsenter,BWITS/nsenter,dalanlan/nsenter,oouyang/nsenter,aaam/nsenter,jpetazzo/nsenter