(PUP-11767) Fix ExpandPathArguments and remove from rubocop_todo

Author: tvpartytonight

.rubocop_todo.yml

@@ -459,11 +459,6 @@ Style/Encoding:
     - 'lib/puppet/type/package.rb'
     - 'lib/puppet/util/windows/service.rb'
 
-# This cop supports safe auto-correction (--auto-correct).
-Style/ExpandPathArguments:
-  Exclude:
-    - 'lib/puppet/util/libuser.rb'
-
 # This cop supports safe auto-correction (--auto-correct).
 Style/ExplicitBlockArgument:
   Enabled: false

lib/puppet/util/libuser.rb

@@ -2,7 +2,7 @@
 
 module Puppet::Util::Libuser
    def self.getconf
-     File.expand_path("../libuser.conf", __FILE__)
+     File.expand_path('libuser.conf', __dir__)
    end
 
    def self.getenv