postgres: drop redundant cli socket override

group_vars/matrix_servers

@@ -3986,7 +3986,6 @@ postgres_gid: "{{ matrix_user_gid }}"
 
 # unix socket connection, disabled by default temporarily until properly tested
 postgres_container_unix_socket_enabled: false
-postgres_cli_use_unix_socket_enabled: false
 
 postgres_allowed_versions_auto: "{{ backup_borg_supported_postgres_versions | map('int') if backup_borg_enabled | default(false) and backup_borg_postgresql_enabled | default(false) else [] }}"