Remove dependency on puppetlabs/ruby module

[adoom42]

The module depends on the puppetlabs/ruby module. From metadata.json:

    {
      "name": "puppetlabs/ruby",
      "version_requirement": ">= 0.6.0 < 2.0.0"
    },

It appears that the ruby module has been abandoned: https://github.com/puppetlabs/puppetlabs-ruby

This repository has been archived by the owner. It is now read-only.

Please find another way to handle ruby installs.

[igalic]

do we need to?

given that r10k runs within puppet, from the puppet installation itself, do we really need to guarantee a Ruby installation?

perhaps we should, "simply", rip out all the code that deals with Ruby as a dependency / prerequisite, along with this module dependency.