feat(config): remove the info file

The info file was meant to help the user from accidently making a
mistake but often times it just confuses people:

https://github.com/coreos/etcd/issues/356
https://github.com/coreos/etcd/issues/531
https://github.com/coreos/etcd/issues/318

Lets remove the info file for this next release.
Merge pull request #532 from philips/remove-info-file

feat(config): remove the info file