If, for whatever reason, you'd like to disable the domlogs (domain logs) for all domains on your cPanel server, simply follow this guide!
1) Run the following commands via SSH:
mkdir -pv /etc/apache2/conf.d/userdata/
touch /etc/apache2/conf.d/userdata/include.conf
2) Add the below content to /etc/apache2/conf.d/userdata/include.conf
<IfModule mod_userdir.c>
CustomLog /dev/null combined
</IfModule>
3) Run the following commands via SSH:
/usr/local/cpanel/scripts/rebuildhttpdconf
/usr/local/cpanel/scripts/restartsrv_httpd
You're all done!
Log files at /usr/local/apache/domlogs on your cPanel server should no longer populate.