remove obsolete & no longer supported option `docker_container.purge_networks`

tasks/main.yml

@@ -22,7 +22,6 @@
       tmpfs_mode: '1777'
       tmpfs_size: 4k
     networks: [name: '{{ onion_service_network_name }}']
-    purge_networks: yes
     cap_drop: [ALL]
     security_opts: [no-new-privileges]
     cpu_quota: 8000