Remove unused prometheus network

ansible/roles/forrest/files/prometheus/docker-compose.yml

@@ -9,7 +9,6 @@ services:
       - /mnt/tank/dbs/prometheus/forrest/:/prometheus/
     networks:
       - default
-      - prometheus
       - grafana
     ports:
       - "{{ pve_hosts.forrest.ip }}:9090:9090"
@@ -21,7 +20,5 @@ services:
       - ./blackbox.yml:/etc/blackbox_exporter/config.yml
 
 networks:
-  prometheus:
-    external: true
   grafana:
     external: true

ansible/roles/forrest/tasks/prometheus.yml

@@ -1,7 +1,3 @@
-- name: Create network
-  docker_network:
-    name: prometheus
-
 - name: Create prometheus install directory
   file:
     path: /opt/prometheus