Removes etc-kubernetes-data-etcd.mount (#63)
Removes etc-kubernetes-data-etcd.mount (#63)

Fixes https://github.com/giantswarm/k8scloudconfig/issues/61

This mount is legacy from the older platform, and is not actually
defined anywhere. Cleaning up a little.
giantswarm/k8scloudconfig,giantswarm/k8scloudconfig