WattmonOS 3.12+
Remove a script from the CRON scheduler
/lib/uphp/system.inc
This will attempt to remove the script from the scheduler. This will effectively recreate the crontab file and changes will only be applied after a reboot.
$filename: Full path to filename to be executed
int - 1 if the script was found and removed, 0 if the script was not found in the crontab