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/changedetection-compose.yml.j2

@@ -5,11 +5,6 @@ services:
       container_name: changedetection
       hostname: changedetection
       labels:
-        glance.name: Changedetection
-        glance.icon: si:watchtower
-        glance.url: https://{{ subdomains.watcher }}/
-        glance.description: Changedetection
-        glance.id: changedetection
         mag37.dockcheck.update: true
       volumes:
         - changedetection-data:/datastore
@@ -95,8 +90,6 @@ services:
     sockpuppetbrowser:
         hostname: sockpuppetbrowser
         labels:
-          glance.parent: changedetection
-          glance.name: Browser
           mag37.dockcheck.update: true
         image: dgtlmoon/sockpuppetbrowser:latest
         cap_add: