gogs shouldn't provide the unsecure default config

roles/service-gogs/templates/gogs_unsecure.conf.j2

@@ -1,6 +1,6 @@
 server {
-  listen          [::]:80 default_server;
-  listen          80 default_server;
+  listen          [::]:80;
+  listen          80;
   server_name     {{ gogs_domain }};
 
   access_log off;