[PATCH] UefiCpuPkg/MtrrLib: Remove unnecessary API MtrrGetVariableMtrr()

["Ni, Ray" <ray.ni@intel.com>]

MtrrGetVariableMtrr() returns all the variable MTRR settings.
But in fact MtrrGetAllMtrrs() is always used by callers to get all MTRR
settings including the fixed and variable ones.

The patch removes the necessary API MtrrGetVariableMtrr() to simplify
the MtrrLib API.

There is no code in edk2 and edk2-platforms repo that calls
MtrrGetVariableMtrr().

Signed-off-by: Ray Ni <ray.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
---
 UefiCpuPkg/Include/Library/MtrrLib.h | 17 +----------------
 UefiCpuPkg/Library/MtrrLib/MtrrLib.c | 27 +--------------------------
 2 files changed, 2 insertions(+), 42 deletions(-)

diff --git a/UefiCpuPkg/Include/Library/MtrrLib.h b/UefiCpuPkg/Include/Library/MtrrLib.h
index 95ffbc8bf1..cfe3c0ab59 100644
--- a/UefiCpuPkg/Include/Library/MtrrLib.h
+++ b/UefiCpuPkg/Include/Library/MtrrLib.h
@@ -1,7 +1,7 @@
 /** @file
   MTRR setting library
 
-  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2008 - 2020, Intel Corporation. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -185,21 +185,6 @@ MtrrGetMemoryAttribute (
   );
 
 
-/**
-  This function will get the raw value in variable MTRRs
-
-  @param[out]  VariableSettings   A buffer to hold variable MTRRs content.
-
-  @return The buffer point to MTRR_VARIABLE_SETTINGS in which holds the content of the variable MTRR
-
-**/
-MTRR_VARIABLE_SETTINGS*
-EFIAPI
-MtrrGetVariableMtrr (
-  OUT MTRR_VARIABLE_SETTINGS         *VariableSettings
-  );
-
-
 /**
   This function sets variable MTRRs
 
diff --git a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
index dfa848022b..f4a10edc87 100644
--- a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
+++ b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
@@ -5,7 +5,7 @@
     Most of services in this library instance are suggested to be invoked by BSP only,
     except for MtrrSetAllMtrrs() which is used to sync BSP's MTRR setting to APs.
 
-  Copyright (c) 2008 - 2019, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2008 - 2020, Intel Corporation. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -456,31 +456,6 @@ MtrrGetVariableMtrrWorker (
   return  VariableSettings;
 }
 
-/**
-  This function will get the raw value in variable MTRRs
-
-  @param[out]  VariableSettings   A buffer to hold variable MTRRs content.
-
-  @return The VariableSettings input pointer
-
-**/
-MTRR_VARIABLE_SETTINGS*
-EFIAPI
-MtrrGetVariableMtrr (
-  OUT MTRR_VARIABLE_SETTINGS         *VariableSettings
-  )
-{
-  if (!IsMtrrSupported ()) {
-    return VariableSettings;
-  }
-
-  return MtrrGetVariableMtrrWorker (
-           NULL,
-           GetVariableMtrrCountWorker (),
-           VariableSettings
-           );
-}
-
 /**
   Programs fixed MTRRs registers.
 
-- 
2.27.0.windows.1