remove constraints on docker service placement

ansible/roles/seafile/docker-stack.yml.j2

@@ -32,20 +32,12 @@ services:
           nocopy: true
     networks: 
       - seafile
-    deploy:
-      placement:
-        constraints:
-          - "node.labels.seafile == true"
  
   memcached: 
     image: memcached:1.6 
     entrypoint: memcached -m 256 
     networks: 
       - seafile
-    deploy:
-      placement:
-        constraints:
-          - "node.labels.seafile == true"
            
   seafile: 
     image: seafileltd/seafile-mc:9.0.10 
@@ -64,9 +56,6 @@ services:
       - SEAFILE_SERVER_LETSENCRYPT=false
       - SEAFILE_SERVER_HOSTNAME={{ seafile_domain }}
     deploy:
-      placement:
-        constraints:
-          - "node.labels.seafile == true"
       labels:
         - traefik.enable=true
         - traefik.http.routers.seafile.entrypoints=websecure