icp: remove digest entry points

For whatever reason, we call digest mechanisms directly, not through the
KCF digest provider. So we can remove those entry points entirely.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16209

module/icp/io/aes.c

@@ -72,7 +72,6 @@ static const crypto_ctx_ops_t aes_ctx_ops = {
 };
 
 static const crypto_ops_t aes_crypto_ops = {
-	NULL,
 	&aes_cipher_ops,
 	NULL,
 	&aes_ctx_ops,