The deletion URL cannot be located easily, but you can find it through the FAQ. You probably won’t really need to state why you’re leaving, although they probably appreciate it.
URLS:
http://www.yelp.com
http://www.yelp.com/contact?topic=support&subtopic=close
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.