Remove some services from default deployment

Services I have not used or not used for a long time will now not be
deployed by default (but could still be specifically targeted through
tags).

site.yml

@@ -49,12 +49,16 @@
     - name: Install traggo
       import_role:
         role: traggo
-      tags: traggo
+      tags:
+        - traggo
+        - never
 
     - name: Install monica
       import_role:
         role: monica
-      tags: monica
+      tags:
+        - monica
+        - never
 
     - name: Install nextcloud
       import_role:
@@ -79,4 +83,6 @@
     - name: Install ntfy
       import_role:
         role: ntfy
-      tags: ntfy
+      tags:
+        - ntfy
+        - never