How to suppress the cron alert messages from cpanel, you may want to pipe:
php -q /home/username/crons/cron.php >/dev/null 2>&1
*/5 * * * * php -q /home/username/public_html/crons/cron.php >/dev/null 2>&1
You will only want to do this if you know 100% that your crons are firing or launching.
Such as if you use a 3rd party Cron Services like http://www.EasyCron.com
But do make sure the time zone is set to the server time zone
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