Use default nodename when removing

resources/rabbitmq_service/actions/remove.pp

@@ -1,11 +1,8 @@
 $resource = hiera($::resource_name)
 
-$node_name = $resource['input']['node_name']['value']
-
 class { '::rabbitmq':
   package_ensure    => 'absent',
   environment_variables   => {
-    'RABBITMQ_NODENAME'     => $node_name,
     'RABBITMQ_SERVICENAME'  => 'RabbitMQ'
   }
 }