title: Safely deleting an aurora read replica
body: <p>I have an aurora cluster with one writer and two readers. I would like to delete one reader.</p>
  
  <p>If I simply right click and hit delete replica, it does not cleanly terminate connections but instead errors out clients trying to connect to the reader endpoint.</p>
  
  <p>How do you delete a read replica without dropping connections or erroring out connections to the reader endpoint?</p>