Open Facebook and log in
Go to the person’s profile or your Friends list
Click or tap Friends
Select Unfriend
Confirm the action
To remove a follower, go to their profile or your followers list
Click or tap the three-dot menu
Select Block or Remove Follower if available
To delete a contact from Messenger, open Messenger
Open the chat with the person
Tap their name or info icon
Select Block or Remove Contact if available