How do I remove this Form 8915A or 8915B, Qualified Disaster Retirement Plan Distributions and Repayments, in this return

When you entered a 1099-R it asked you if you received a disaster disbursement from your retirement account.  If you answered yes then TurboTax generated the form for you.  If you delete the 1099-R that generated the questions and then re-enter it - making sure to answer 'no' to the disaster disbursement questions this time then, as @macuser_22 says above, it should remove the form.

If it doesn't you can delete the form itself.

To Delete a form:

1. Select Tax Tools from the menu on the left

2. Then select Tools

3. When the new menu pops up select Delete a Form

4. You will see a list of all the forms in your return

5. Find the form that you want to delete

6. Select the Form

7. Click Delete on the right  

Tax forms are interconnected.  While you are on this screen don’t start deleting forms you don’t recognize.