What do you mean by deleting AP ?? can you elaborate please ??
If you have provisioned your RAP as cert based it will be reprovisioned automatically , provided you have configured your RAP white list DB properly.
If you have provisioned your RAP as PSK based and if you have purged the AP, you have re provision the AP as a RAP otherwise if it is not purged don't worry, it will come up automatically, provide if the AP is reachable to the controller.
Please feel free for any further query on this.
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what i mean by deleting is, when you remove down AP from the controller. Right now the AP is up and reachable from the controller. But not showing up in controller up AP list.