Merge pull request #1357 from justinstoller/fixup-hiera-doc

(maint) Update docs for hiera.yaml best practices

doc/common-patterns.mkd

@@ -12,8 +12,7 @@ Use a [Control Repo](https://docs.puppet.com/pe/latest/cmgmt_control_repo.html)
 to store your `Puppetfile`.
 
 Hiera data should be in the Control repo OR as a separate source in
-`r10k.yaml`. Any `hiera.yaml` in the Control repo will be ignored on a per
-environment basis, locating it at `/etc/puppetlabs/puppet/hiera.yaml` is prefered.
+`r10k.yaml`.
 
 Each puppet module should be contained in its own independent forge module or
 repository.