Removes unused external network from configuration

Simplifies service setup by eliminating reference to an external network
that was not in active use. Reduces configuration complexity and potential
for misconfiguration.

nodes/waldorf/openwebui/compose.yaml

@@ -14,15 +14,9 @@ services:
     # If you need to talk to your new MCP Gateway
     # extra_hosts:
     #   - "mcp-gateway:10.0.0.x" # IP of Heimdall
-    networks:
-      - proxy-net
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.openwebui.rule=Host(`gpt.castaldifamily.com`)"
       - "traefik.http.routers.openwebui.entrypoints=websecure"
       - "traefik.http.routers.openwebui.tls.certresolver=cloudflare"
-      - "traefik.http.services.openwebui.loadbalancer.server.port=8080"
-
-networks:
-  proxy-net:
-    external: true
+      - "traefik.http.services.openwebui.loadbalancer.server.port=8080"