Go onto your profile, click on photos, click the photo you want to delete, and at the bottom it'll say delete, edit, set as profile picture, click delete. :)
Go to your photos and under your picture there should be a "delete" option. Just click that :)
If all you have is a profile picture, you can't actually remove it - I cleared it for you.
but it says that i don't have any pics to do anything with? im confused!