How to delete someone on Facebook
Deleting a Facebook friend is synonymous to unfollow them. To delete people on Facebook, do the following;

1. Log in to your Facebook account

2. Next, you'll need to navigate to the person' s Facebook profile. Do that and proceed with the next step below.

3. Click the[b] Friends button[/b], and a drop-down menu will appear. The "friends button" can be found at the bottom right of the person's cover photo.

4. Finally, click unfriend from the drop-down menu

SOURCE: https://www.facebookpeadia.com/2018/10/unfollow-friends-facebook.html

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