Are you getting below error ??
Unable to remove add-on domain from cPanel – Error from Park wrapper: Sorry, you do not control the domain
Remove the entries for the domain from the following files.
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/var/cpanel/users/username Run Script — /scripts/updateuserdomains
/scripts/killdns domain.db
/usr/local/apache/conf/httpd.conf
/etc/localdomains
/etc/userdomains
/etc/trueuserdomains
/etc/trueuserowners
/etc/valiases/domain.com
/etc/vdomainaliases/domain.com
/etc/vfilters/domain.com
/var/cpanel/userdata/username – Remove the parked domain folders /var/cpanel/userdate/username/main