SilcSKRStatus silc_skr_del_public_key(SilcSKR skr,
                                          SilcPublicKey public_key,
                                          void *key_context);

    Removes and destroyes the public key from the repository.  The
    public_key will become invalid after this call returns.

    Returns SILC_SKR_OK if the key was added successfully, and error
    status if key could not be added, or has been added already.