do not need special network if I ignore the default network, composer makes one with DNS discovery on it and its fine

docker-compose.yml

@@ -380,17 +380,3 @@ services:
       - /export/docker/container/grafana/grafana/provisioning:/etc/grafana/provisioning
     env_file:
       - /export/docker/container/grafana/config.monitoring
-
-
-# override the default network to use the "user-generated" plex-net
-# weirdy, ONLY, user-generated networks allow DNS service discovery
-# (e.g. comms between containers on the 'name', e.g. nzbget resolves to the
-# internal ip on the bridged plex-net for the nzbget container)
-# finally, this only worked when the host (mara) had a routable DNS server in 
-# /etc/resolv.conf -- It used to be a 127.0.0/24 addr, and this won't work in 
-# a docker network, so it was then rewritten to resolving off of 8.8.8.8 and no
-# service discovery :(
-networks:
-  default:
-    external:
-      name: media-net