You can edit, update, or delete a reference from your profile at any point.
First things first, make sure you're on your me tab and navigate to your profile.
Under your profile locate the reference section.
Locate the reference you want to edit, update, or delete. You can do this to references that are either pending or completed. Select the reference.
From here you can either edit, update, or delete the reference. To delete the reference, scroll down to the bottom and click Delete Reference