- g10/delkey.c (agent_delete_secret_key): New.
(do_delete_key): Use the new secret key deletion function.
The new key deletion function asks the gpg agent to delete
the secret key associated with the specified public key.
It returns GPG_ERR_NO_SECKEY if there is no secret key
associated with the given public key.
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>