remove out-of-date bosh-lite docs
remove out-of-date bosh-lite docs

[finishes #77702180]

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