If you are looking to remove your account from Fanduel they do not offer a online removal outlet however you simply need to just send them a support ticket.
Direct Link: https://www.fanduel.com/p/SupportTicket
First enter your name, email address and username. Then you need to choose:
How can we help you: Login, password or username
Subject: Request to delete account
Attention Fanduel Customer Support
I wish to close my account on your fanduel.com.