collectd: remove nginx status collection

we don't use this at all

src/nginxconfig.ejs

@@ -15,16 +15,8 @@ server {
 <% if (vhost) { -%>
     server_name  <%= vhost %>;
 <% } else { -%>
-    # IP based access from collectd or initial cloudron setup. TODO: match the IPv6 address
+    # IP based access for initial cloudron setup. TODO: match the IPv6 address
     server_name  "~^\d+\.\d+\.\d+\.\d+$";
-
-    # collectd
-    location /nginx_status {
-        stub_status on;
-        access_log off;
-        allow 127.0.0.1;
-        deny all;
-    }
 <% } -%>
 
     # acme challenges (for cert renewal where the vhost config exists)