Unlike hiding or blocking, deleting an account from your friend list cannot be undone. Please keep this in mind if you're thinking of deleting the account of someone who you don't have any other way to contact.
To delete an account:
1. Tap the Home tab > Settings.
2. Tap Friends.
3. Tap Hidden accounts or Blocked accounts.
4. Tap Edit or put a check next to the account you want to delete.
5. Tap Delete.
Tap here to open the Settings menu from your smartphone.