Updated site references

config.yml

@@ -79,11 +79,6 @@ services:
         subtitle: 'Audiobooks.'
         url: 'https://audio.schmökerei.de'
 
-      - name: 'Bookstack'
-        logo: 'assets/tools/bookstack.png'
-        subtitle: 'Wiki/KMS.'
-        url: 'https://wiki.schmökerei.de'
-
   - name: 'Tools'
     icon: 'fas fa-tools'
     items:
@@ -97,11 +92,6 @@ services:
         subtitle: 'Diagramme erstellen.'
         url: 'https://draw.schmökerei.de'
 
-      - name: 'Nextcloud'
-        logo: 'assets/tools/nextcloud.png'
-        subtitle: 'Kollaboration und DAV.'
-        url: 'https://cloud.schmökerei.de'
-
       - name: 'Stirling-PDF'
         logo: 'assets/tools/stirling.png'
         subtitle: 'PDF Toolbox.'