Revert "Debug why we don't work in /etc/shells"
Revert "Debug why we don't work in /etc/shells"

This reverts commit ff1d74fe2642ddaf07a74ddbba2fc48b60cabf23.

mehulsbhatt/dockersh,pugna0/dockersh,CS497-F15/dockersh,CS497-F15/dockersh,Yelp/dockersh,beni55/dockersh,mehulsbhatt/dockersh,chenrui2014/dockersh,Yelp/dockersh,pugna0/dockersh,chenrui2014/dockersh,beni55/dockersh