Swift: Get rid of xinetd configuration

... because xinetd is no longer available in CentOS Stream 9. Current
puppet-rsync[1] and puppet-swift[2] supports disabling xinetd and
actually xinetd is now disabled by default in CentOS Stream 9.

[1] https://github.com/puppetlabs/puppetlabs-rsync/pull/139
[2] https://review.opendev.org/c/openstack/puppet-swift/+/795832

Change-Id: Iffc8756b9e5d2690338d508dda70a2e45361dd12

deployment/swift/swift-storage-container-puppet.yaml

@@ -265,16 +265,11 @@ outputs:
 
       service_config_settings: {}
       # BEGIN DOCKER SETTINGS
-      # (bandini) - We can remove the xinetd noop lines once Centos8 is not supported anymore
       puppet_config:
         config_volume: swift
         puppet_tags: swift_config,swift_container_config,swift_container_sync_realms_config,swift_account_config,swift_object_config,swift_object_expirer_config,rsync::server
-        step_config:
-          list_join:
-            - "\n"
-            - - "class xinetd() {}"
-              - "define xinetd::service($bind='',$port='',$server='',$server_args='') {}"
-              - "include tripleo::profile::base::swift::storage"
+        step_config: |
+          include tripleo::profile::base::swift::storage
         config_image: {get_attr: [RoleParametersValue, value, ContainerSwiftConfigImage]}
       kolla_config:
         /var/lib/kolla/config_files/swift_account_auditor.json: