Revert "SecurityPkg: introduce the SM3 digest algorithm"

This reverts commit 06dd5863b6.

The reason is that said commit directly depends on commit 49c1e683c4
("MdePkg/Protocol/Hash: introduce GUID for SM3", 2019-07-03), and the
latter commit is going to be reverted, due to its review process not
having followed established edk2 norms.

Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Imran Desai <imran.desai@intel.com>
Cc: Jian Wang <jian.j.wang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1781
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>

SecurityPkg/Include/Library/HashLib.h

@@ -137,7 +137,6 @@ EFI_STATUS
 #define HASH_ALGORITHM_SHA256_GUID  EFI_HASH_ALGORITHM_SHA256_GUID
 #define HASH_ALGORITHM_SHA384_GUID  EFI_HASH_ALGORITHM_SHA384_GUID
 #define HASH_ALGORITHM_SHA512_GUID  EFI_HASH_ALGORITHM_SHA512_GUID
-#define HASH_ALGORITHM_SM3_256_GUID EFI_HASH_ALGORITHM_SM3_256_GUID
 
 typedef struct {
   EFI_GUID                           HashGuid;