Fix the Let's Encrypt config for Parity

The SSL port wasn't set in the variables

site-cookbooks/kosmos-parity/templates/default/nginx_conf_parity_letsencrypt.erb

@@ -1,9 +1,6 @@
 # Generated by Chef
 server {
   listen 80; # For Let's Encrypt
-  <% if File.exist?(@ssl_cert) && File.exist?(@ssl_key) -%>
-  listen <%= @external_port %> ssl http2;
-  <% end -%>
 
   server_name <%= @server_name %>;
 
@@ -13,9 +10,4 @@ server {
   location /.well-known {
     root "/var/www/<%= @server_name %>";
   }
-
-  <% if File.exist?(@ssl_cert) && File.exist?(@ssl_key) -%>
-  ssl_certificate <%= @ssl_cert %>;
-  ssl_certificate_key <%= @ssl_key %>;
-  <% end -%>
 }