Nginx Redirect www to non WWW

nginx_redirect

#Main Domain
#https?://www.example.com;
server {

        listen 80;
        server_name ~^www\.(?<dname>\w+)\.(?<dtype>\w+)$;
        return 301 $scheme://$dname.$dtype$request_uri;
}

#Sub Domains if in case
#https?://www.chat.example.com;
server {

        listen 80;
        server_name ~^www\.(?<name>\w+)\.(?<dname>\w+)\.(?<dtype>\w+)$;
        return 301 $scheme://$name.$dname.$dtype$request_uri;
}