Delete an Existing Certificate from ASA
You can delete a certificate one after another. After deleting a certificate, it cannot be restored.
Procedure
Step 1  | In the left pane, click .  | 
Step 2  | Select the ASA device and in the Management on the right, click Trustpoints.  | 
Step 3  | Click the certificate to be deleted and in the Actions pane on the right, click Remove.  | 
Step 4  | Click OK to remove the selected certificate.  |