Revert "bump atc"
Revert "bump atc"

This reverts commit 49e67aa911a879bbeabc1a8b75742fc1b5d6d04c.

do not want in 0.49.0

squeedee/concourse,cjcjameson/concourse,squeedee/concourse,longnguyen11288/concourse,holgero/concourse,concourse/concourse,sedouard/concourse,cjcjameson/concourse,zachgersh/concourse,Amit-PivotalLabs/concourse,holgero/concourse,sedouard/concourse,holgero/concourse,CloudCredo/concourse,zachgersh/concourse,beni55/concourse,zachgersh/concourse,longnguyen11288/concourse,beni55/concourse,cjcjameson/concourse,sedouard/concourse,concourse/concourse,Amit-PivotalLabs/concourse,jbayer/concourse,longnguyen11288/concourse,concourse/concourse,concourse/concourse,CloudCredo/concourse,CloudCredo/concourse,Amit-PivotalLabs/concourse,squeedee/concourse,jbayer/concourse,concourse/concourse,beni55/concourse,jbayer/concourse