Remove error_log setting from nginx.tmpl

It's already set correctly in nginx.conf

nginx.tmpl

@@ -36,7 +36,6 @@ log_format vhost '$host $remote_addr - $remote_user [$time_local] '
                  '"$http_referer" "$http_user_agent"';
 
 access_log /proc/self/fd/1 vhost;
-error_log /proc/self/fd/2;
 
 # HTTP 1.1 support
 proxy_http_version 1.1;