Breaking: #69916 - Removed BackendLogin::getRsaPublicKey AJAX handler 

See forge#69916

Description 

The deprecated AJAX handler BackendLogin::getRsaPublicKey has been removed in favor of rsa_publickey. As getRsaPublicKey was the only method in this class, the file typo3/sysext/rsaauth/Classes/Backend/AjaxLoginHandler.php has been removed without substitution.

Impact 

Calling the removed handler will result in an error.

Affected Installations 

All 3rd party extensions using the removed handler are affected.

Migration 

Use the AJAX handler rsa_publickey instead of BackendLogin::getRsaPublicKey.