remove constraints on docker service placement

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

@@ -39,9 +39,6 @@ services:
         volume:
           nocopy: true
     deploy:
-      placement:
-        constraints:
-          - "node.labels.overleaf == true"
       labels:
         - traefik.enable=true
         - traefik.http.routers.overleaf.entrypoints=websecure
@@ -100,10 +97,6 @@ services:
       interval: 10s
       timeout: 10s
       retries: 5
-    deploy:
-      placement:
-        constraints:
-          - "node.labels.overleaf == true"
 
   overleaf-redis:
     image: redis:5
@@ -117,7 +110,3 @@ services:
         target: /data
         volume:
           nocopy: true
-    deploy:
-      placement:
-        constraints:
-          - "node.labels.overleaf == true"