To remove a friend from your friends list, open the Social window by pressing <kbd>O</kbd>:

![enter image description here][1]

Then right click on your friend and select the "Remove" option from the menu. This will remove the person from your friends list. 

**Note**: your friends list in WoW is actually your Battle.net friends list, removing a friend from within WoW will also remove them from within Starcraft 2 and Diablo 3.


  [1]: https://i.sstatic.net/uuXpC.png