crypto: hash - Removed vestigial ahash fields

The base field in ahash_tfm appears to have been cut-n-pasted from
ablkcipher.  It isn't needed here at all.  Similarly, the info field
in ahash_request also appears to have originated from its cipher
counter-part and is vestigial.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/digest.c

@@ -234,7 +234,6 @@ int crypto_init_digest_ops_async(struct crypto_tfm *tfm)
 	crt->setkey     = dalg->dia_setkey ? digest_async_setkey :
 						digest_async_nosetkey;
 	crt->digestsize = dalg->dia_digestsize;
-	crt->base       = __crypto_ahash_cast(tfm);
 
 	return 0;
 }