Remove the unused Glance dashboard

Drop the Glance stack, its home. route and DNS record, the glance.*
labels on every container, and the Glance restart in the Warhammer
feed cron script. Update docs to match.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

roles/docker/templates/heyform-compose.yml.j2

@@ -8,12 +8,6 @@ services:
     depends_on:
       - mongo
       - keydb
-    labels:
-      glance.name: Heyform
-      glance.icon: si:googleforms
-      glance.url: https://{{ subdomains.heyform }}/
-      glance.description: Forms server
-      glance.id: heyform
     environment:
       - APP_HOMEPAGE_URL=http://{{ subdomains.heyform }}
       - SESSION_KEY={{ vault_heyform.session_key }}
@@ -31,9 +25,6 @@ services:
   mongo:
     image: percona/percona-server-mongodb:4.4
     restart: always
-    labels:
-      glance.parent: heyform
-      glance.name: MongoDB
     volumes:
       # Persist MongoDB data
       - database:/data/db
@@ -42,9 +33,6 @@ services:
     image: eqalpha/keydb:latest
     restart: always
     command: keydb-server --appendonly yes
-    labels:
-      glance.parent: heyform
-      glance.name: KeyDB
     volumes:
       # Persist KeyDB data
       - keydb:/data