Remove 'pre' class.

manifests/ident.pp

 class irc_bouncer::ident {
-  require ::irc_bouncer::pre
-
   ensure_packages (
     ['oidentd', ],
     { ensure => installed, })

manifests/pre.pp

-class irc_bouncer::pre {
-  # exec { 'stop znc':
-  #   command => '/bin/systemctl stop znc',
-  # } -> Irc_bouncer::Module <| |>
-}

manifests/setup.pp

 class irc_bouncer::setup {
-  require ::irc_bouncer::pre
-
   file { [
     '/var/lib/znc',
     '/var/lib/znc/configs',