remove user's cron jobs howto

additionally, below are ways to list out and remove user's cron job, as superuser

# crontab -u username -l

to list out the current cron job by the particular username account.

Deleting them is as easy as

# crontab -u username -r

Curious for pending jobs issued by that particular user?

# su username
# jobs

would list to you the jobs currently being processed by the system

HTH