You simply add a delete button to the form, and then detect the deletion process and argument and issue a DELETE call.
I can't help but notice the link at the bottom. You're not seriously spawning new directories for each profile are you? If you are, you'll need to use the unlink() commands to delete the filesystem files, but I'd suggest using a db or filesystem file to control the data. PHP is a dynamic language; creating actual directories is old school.
header('HTTP/1.1 420 Enhance Your Calm');