Update doxygen documentation on HMAC
diff --git a/doxygen/input/doc_hashing.h b/doxygen/input/doc_hashing.h
index 38f8e81..242e2c4 100644
--- a/doxygen/input/doc_hashing.h
+++ b/doxygen/input/doc_hashing.h
@@ -15,10 +15,9 @@
* \c md_init_ctx())
*
* The following hashing-algorithms are provided:
- * - MD2, MD4, MD5 128-bit one-way hash functions by Ron Rivest (see
- * \c md2_hmac(), \c md4_hmac() and \c md5_hmac()).
+ * - MD2, MD4, MD5 128-bit one-way hash functions by Ron Rivest.
* - SHA-1, SHA-256, SHA-384/512 160-bit or more one-way hash functions by
- * NIST and NSA (see\c sha1_hmac(), \c sha256_hmac() and \c sha512_hmac()).
+ * NIST and NSA.
*
* This module provides one-way hashing which can be used for authentication.
*/
