Error
systemctl restart httpd
(98)Address already in use: AH00072: make_sock: could not bind to address [::]:443
grep -ir "^listen" /etc/httpd/*
/etc/httpd/conf/httpd.conf:Listen 80
/etc/httpd/conf.d/ssl.conf:Listen 443 https
/etc/httpd/conf.modules.d/00-ssl.conf:Listen 443
That's not a file that anything in CentOS that I know of supplies.
You can see if it belongs to an rpm by using rpm -qf /etc/httpd/conf.modules.d/00-ssl.conf