ikev2: Remove private AUTH_BLISS method

We use the new signature authentication instead for this.  This is not
backward compatible but we only released one version with BLISS support,
and the key format will change anyway with the next release.

src/libcharon/sa/ikev2/authenticators/pubkey_authenticator.c

@@ -226,11 +226,6 @@ METHOD(authenticator_t, build, status_t,
 						return status;
 				}
 				break;
-			case KEY_BLISS:
-				/* we currently use SHA512 only */
-				scheme = SIGN_BLISS_WITH_SHA512;
-				auth_method = AUTH_BLISS;
-				break;
 			default:
 				DBG1(DBG_IKE, "private key of type %N not supported",
 					 key_type_names, private->get_type(private));
@@ -299,10 +294,6 @@ METHOD(authenticator_t, process, status_t,
 		case AUTH_ECDSA_521:
 			scheme = SIGN_ECDSA_521;
 			break;
-		case AUTH_BLISS:
-			key_type = KEY_BLISS;
-			scheme = SIGN_BLISS_WITH_SHA512;
-			break;
 		case AUTH_DS:
 			if (parse_signature_auth_data(&auth_data, &key_type, &scheme))
 			{