cert-to-efi-sig-list: remove unimplemented RSA2048 certificate support
cert-to-efi-sig-list: remove unimplemented RSA2048 certificate support

mjg59/efitools,mjg59/efitools,msekletar/efitools,marineam/efitools,marineam/efitools,msekletar/efitools,msekletar/efitools,marineam/efitools,marineam/efitools,msekletar/efitools,mjg59/efitools,mjg59/efitools