Remove SHA384_Transform from sha.h.

This function doesn't actually exist. (If it did, it would be the same as
SHA512_Transform. We currently omit SHA224 and SHA384's low-level transform
functions.)

Change-Id: Ia9d3d7c86e8f70fd5e4f13b8de4f08440dccbdcb
Reviewed-on: https://boringssl-review.googlesource.com/32064
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/sha.h

diff --git a/include/openssl/sha.h b/include/openssl/sha.h
index 306dc80..2c0dcb7 100644
--- a/include/openssl/sha.h
+++ b/include/openssl/sha.h
@@ -211,11 +211,6 @@
 // |out|.
 OPENSSL_EXPORT uint8_t *SHA384(const uint8_t *data, size_t len, uint8_t *out);
 
-// SHA384_Transform is a low-level function that performs a single, SHA-384
-// block transformation using the state from |sha| and |SHA384_CBLOCK| bytes
-// from |block|.
-OPENSSL_EXPORT void SHA384_Transform(SHA512_CTX *sha, const uint8_t *block);
-
 
 // SHA-512.