Remove unused variables
Remove unused variables

The `$varnish::params::version` and `$varnish::params::real_version` variables are unused. What's worse is that these variables reference the `$varnish::version` variable, which is not in scope:

```
Warning: Scope(Class[Varnish::Params]): Could not look up qualified variable '::varnish::version'; class ::varnish has not been evaluated
```

maxchk/puppet-varnish,maxchk/puppet-varnish,joshuaspence/puppet-varnish,joshuaspence/puppet-varnish