Hi Ed,
To remove buyers from your feedback reminder list follow these steps:
1. Login to your control panel.
2. You will be redirect to an eBay authorization page to login through eBay.
3. In your control panel click on your "blacklist" tab.

4. Place the buyer's name in the text field and click on add.
5. Now you will be able to see the name added to your blacklist below. To remove the name simply click on the "X" sign near the name.
That's it! Now a reminder won't be sent out to that buyer.
If you have any other questions feel free to comment below.
Best regards,
- Tzipi.