Delete docker in docker Dockerfile
Delete docker in docker Dockerfile

We tried using the docker:dind to extract the Eirinifs.tar to use a fully autmated mechanism. But couldn't get dind to work yet.

Signed-off-by: Peter Goetz <1bf679f6f155949fea19af278a2667a47961da6b@gmail.com>

cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci