Hi,

You need to remove the whmreseller directory and then remove whmreseller link from WHM

rm /usr/local/cpanel/whostmgr/docroot/cgi/whmreseller -rf
rm -f /usr/local/cpanel/whostmgr/docroot/cgi/addon_whmreseller.cgi

Then remove cronjobs

crontab -e

Remove the following jobs …
/usr/local/cpanel/whostmgr/docroot/cgi/whmreseller/wdmonitor >/dev/null 2>&1
/usr/local/cpanel/whostmgr/docroot/cgi/whmreseller/versionupdate2 >/dev/null 2>&1
/usr/local/cpanel/whostmgr/docroot/cgi/whmreseller/scripts/backupcron >/dev/null 2>&1

Use this method in your own risk.

Best regards,
Saj