This is my current rewrite rule:

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

And my virtual host conf

NameVirtualHost *:80
<VirtualHost *:80>
        ServerAdmin webmaster@localhost
        ServerName domain.com
        ServerAlias www.domain.com domain.com
        DocumentRoot /var/www/domain.com/public_html

        <Directory /var/www/domain/public_html/>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride All
            Require all granted
        </Directory>

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        <IfModule mod_dir.c>
            DirectoryIndex index.php index.pl index.cgi index.html index.xhtml index.htm
        </IfModule>

</VirtualHost>