Fix document in init.pp

The current version installs 9.2.0, but the doc is still old.
To prevent situation like this, I think we should delete this instead of updating the version.

ref: https://github.com/boxen/puppet-keyremap4macbook/blob/09c79ac1ca49bcd21460e88b806dce77640efb8b/manifests/config.pp#L8