Remove useless group_vars/matrix_servers overrides

These variables were being assigned in group_vars/matrix_servers to
values byte-identical (or functionally identical) to what the
respective role's defaults/main.yml already provides.

Beyond just being noise, such redundant overrides cause drift over
time. When a role's default is later updated to something saner or
better (for example, switched from a hardcoded value to a derivation
from another variable), the matching line in group_vars/matrix_servers
stays frozen at the old value and silently defeats the improvement,
because group_vars beats role defaults in Ansible's precedence order.

The maubot management hostname fix in
https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/5248
is an example of this: the role default had been improved to derive
from matrix_bot_maubot_hostname, but the stale group_vars override
held it back to matrix_server_fqn_matrix.

Removing these overrides lets the role defaults do their job.

Closes https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/5248

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

group_vars/matrix_servers

@@ -2178,7 +2178,6 @@ matrix_mautrix_wsproxy_systemd_required_services_list_default: |
     ([postgres_identifier ~ '.service'] if (postgres_enabled and matrix_mautrix_wsproxy_syncproxy_database_hostname == postgres_connection_hostname) else [])
   }}
 
-matrix_mautrix_wsproxy_homeserver_domain: "{{ matrix_domain }}"
 matrix_mautrix_wsproxy_homeserver_address: "{{ matrix_addons_homeserver_client_api_url }}"
 
 matrix_mautrix_wsproxy_hostname: "wsproxy.{{ matrix_mautrix_wsproxy_homeserver_domain }}"
@@ -2491,7 +2490,6 @@ matrix_hookshot_container_labels_metrics_middleware_basic_auth_enabled: "{{ matr
 matrix_hookshot_container_labels_metrics_middleware_basic_auth_users: "{{ matrix_metrics_exposure_http_basic_auth_users }}"
 
 matrix_hookshot_public_scheme: "{{ 'https' if matrix_playbook_ssl_enabled else 'http' }}"
-matrix_hookshot_public_hostname: "{{ matrix_server_fqn_matrix }}"
 
 ######################################################################
 #
@@ -3539,8 +3537,6 @@ matrix_rageshake_hostname: "{{ matrix_server_fqn_rageshake }}"
 
 matrix_rageshake_container_image_registry_prefix_upstream: "{{ matrix_container_global_registry_prefix_override if matrix_container_global_registry_prefix_override else matrix_rageshake_container_image_registry_prefix_upstream_default }}"
 
-matrix_rageshake_container_network: matrix-rageshake
-
 matrix_rageshake_container_additional_networks: "{{ [matrix_playbook_reverse_proxyable_services_additional_network] if matrix_playbook_reverse_proxyable_services_additional_network else [] }}"
 
 matrix_rageshake_container_http_host_bind_port: "{{ (matrix_playbook_service_host_bind_interface_prefix ~ '9110') if matrix_playbook_service_host_bind_interface_prefix else '' }}"
@@ -4463,12 +4459,6 @@ matrix_client_element_container_labels_traefik_compression_middleware_name: "{{
 matrix_client_element_default_hs_url: "{{ matrix_homeserver_url }}"
 matrix_client_element_default_is_url: "{{ matrix_identity_server_url }}"
 
-# Use Scalar by default
-matrix_client_element_integrations_ui_url: "https://scalar.vector.im/"
-matrix_client_element_integrations_rest_url: "https://scalar.vector.im/api"
-matrix_client_element_integrations_widgets_urls: "{{ ['https://scalar.vector.im/api'] }}"
-matrix_client_element_integrations_jitsi_widget_url: "https://scalar.vector.im/api/widgets/jitsi.html"
-
 matrix_client_element_self_check_validate_certificates: "{{ matrix_playbook_ssl_enabled }}"
 
 matrix_client_element_registration_enabled: "{{ matrix_synapse_enable_registration }}"
@@ -4698,12 +4688,6 @@ matrix_client_schildichat_container_labels_traefik_tls_certResolver: "{{ traefik
 matrix_client_schildichat_default_hs_url: "{{ matrix_homeserver_url }}"
 matrix_client_schildichat_default_is_url: "{{ matrix_identity_server_url }}"
 
-# Use Scalar by default
-matrix_client_schildichat_integrations_ui_url: "https://scalar.vector.im/"
-matrix_client_schildichat_integrations_rest_url: "https://scalar.vector.im/api"
-matrix_client_schildichat_integrations_widgets_urls: "{{ ['https://scalar.vector.im/api'] }}"
-matrix_client_schildichat_integrations_jitsi_widget_url: "https://scalar.vector.im/api/widgets/jitsi.html"
-
 matrix_client_schildichat_self_check_validate_certificates: "{{ matrix_playbook_ssl_enabled }}"
 
 matrix_client_schildichat_registration_enabled: "{{ matrix_synapse_enable_registration }}"
@@ -4827,7 +4811,6 @@ matrix_synapse_container_labels_internal_client_synapse_admin_api_traefik_entryp
 matrix_synapse_container_labels_public_federation_api_traefik_hostname: "{{ matrix_server_fqn_matrix_federation }}"
 matrix_synapse_container_labels_public_federation_api_traefik_entrypoints: "{{ matrix_federation_traefik_entrypoint_name }}"
 matrix_synapse_container_labels_public_federation_api_traefik_tls: "{{ matrix_federation_traefik_entrypoint_tls }}"
-matrix_synapse_container_labels_public_federation_api_traefik_tls_certResolver: "{{ matrix_synapse_container_labels_traefik_tls_certResolver }}"  # noqa var-naming
 
 matrix_synapse_container_labels_public_metrics_middleware_basic_auth_enabled: "{{ matrix_metrics_exposure_http_basic_auth_enabled }}"
 matrix_synapse_container_labels_public_metrics_middleware_basic_auth_users: "{{ matrix_metrics_exposure_http_basic_auth_users }}"
@@ -4871,7 +4854,6 @@ matrix_synapse_metrics_proxying_path_prefix: "{{ matrix_metrics_exposure_path_pr
 matrix_synapse_email_enabled: "{{ exim_relay_enabled }}"
 matrix_synapse_email_smtp_host: "{{ exim_relay_identifier }}"
 matrix_synapse_email_smtp_port: 8025
-matrix_synapse_email_smtp_require_transport_security: false
 matrix_synapse_email_notif_from: "Matrix <{{ exim_relay_sender_address }}>"
 
 matrix_synapse_turn_uris: "{{ coturn_turn_uris if coturn_enabled else [] }}"
@@ -5225,7 +5207,6 @@ matrix_synapse_usage_exporter_container_network: "{{ matrix_monitoring_container
 
 matrix_synapse_usage_exporter_container_additional_networks: "{{ [matrix_playbook_reverse_proxyable_services_additional_network] if matrix_playbook_reverse_proxyable_services_additional_network else [] }}"
 
-matrix_synapse_usage_exporter_container_labels_traefik_enabled: "{{ matrix_synapse_usage_exporter_proxying_enabled }}"
 matrix_synapse_usage_exporter_container_labels_traefik_docker_network: "{{ matrix_playbook_reverse_proxyable_services_additional_network }}"
 matrix_synapse_usage_exporter_container_labels_traefik_entrypoints: "{{ traefik_entrypoint_primary }}"
 matrix_synapse_usage_exporter_container_labels_traefik_tls_certResolver: "{{ traefik_certResolver_primary }}"
@@ -6417,7 +6398,6 @@ matrix_livekit_jwt_service_enabled: "{{ matrix_rtc_enabled and livekit_server_en
 matrix_livekit_jwt_service_scheme: "{{ 'https' if matrix_playbook_ssl_enabled else 'http' }}"
 
 matrix_livekit_jwt_service_hostname: "{{ matrix_server_fqn_matrix }}"
-matrix_livekit_jwt_service_path_prefix: "/livekit-jwt-service"
 
 matrix_livekit_jwt_service_container_image_self_build: "{{ matrix_architecture not in ['amd64', 'arm64'] }}"