caddy-frontend: Drop unneeded parameter private-ipv4

It's not used at all in current approach.

software/caddy-frontend/buildout.hash.cfg

@@ -26,11 +26,11 @@ md5sum = a6a626fd1579fd1d4b80ea67433ca16a
 
 [profile-caddy-replicate]
 filename = instance-apache-replicate.cfg.in
-md5sum = b7eeb3268b32b9fceb9a6f3c248a7bbf
+md5sum = cc1bf002818e95542ceaff5fa06d9546
 
 [profile-slave-list]
 _update_hash_filename_ = templates/apache-custom-slave-list.cfg.in
-md5sum = e61477243ed7405b1d8b746287a8f03b
+md5sum = c48c1be68d547540971f874e78e5c96d
 
 [profile-replicate-publish-slave-information]
 _update_hash_filename_ = templates/replicate-publish-slave-information.cfg.in

software/caddy-frontend/instance-apache-replicate.cfg.in

@@ -270,7 +270,7 @@ config-monitor-username = ${monitor-instance-parameter:username}
 config-monitor-password = ${monitor-htpasswd:passwd}
 
 software-type = {{frontend_type}}
-return = private-ipv4 slave-instance-information-list monitor-base-url backend-client-csr_id-url csr_id-url csr_id-certificate backend-haproxy-statistic-url
+return = slave-instance-information-list monitor-base-url backend-client-csr_id-url csr_id-url csr_id-certificate backend-haproxy-statistic-url
 
 {#- Send only needed parameters to frontend nodes #}
 {%- set base_node_configuration_dict = {} %}

software/caddy-frontend/templates/apache-custom-slave-list.cfg.in

@@ -434,7 +434,6 @@ hash-existing-files = ${buildout:directory}/software_release/buildout.cfg
 {#- Publish information for the instance #}
 [publish-caddy-information]
 recipe = slapos.cookbook:publish.serialised
-private-ipv4 = {{ instance_parameter_dict['ipv4-random'] }}
 {%- if configuration['extra_slave_instance_list'] %}
 {#-   sort_keys are important in order to avoid shuffling parameters on each run #}
 slave-instance-information-list = {{ json_module.dumps(slave_instance_information_list, sort_keys=True) }}