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diff --git a/MdePkg/Library/PeiSmbusLibSmbus2Ppi/InternalSmbusLib.h b/MdePkg/Library/PeiSmbusLibSmbus2Ppi/InternalSmbusLib.h
deleted file mode 100644
index 00f8078f76..0000000000
--- a/MdePkg/Library/PeiSmbusLibSmbus2Ppi/InternalSmbusLib.h
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@@ -1,80 +0,0 @@
-/** @file
-Internal header file for Smbus library.
-
-Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
-This program and the accompanying materials
-are licensed and made available under the terms and conditions of the BSD License
-which accompanies this distribution. The full text of the license may be found at
-http://opensource.org/licenses/bsd-license.php
-
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-
-**/
-
-#ifndef __INTERNAL_SMBUS_LIB_H_
-#define __INTERNAL_SMBUS_LIB_H_
-
-
-#include <PiPei.h>
-
-#include <Ppi/Smbus2.h>
-
-#include <Library/SmbusLib.h>
-#include <Library/DebugLib.h>
-#include <Library/PeiServicesLib.h>
-#include <Library/BaseMemoryLib.h>
-
-//
-// Declaration for internal functions
-//
-
-/**
- Gets Smbus PPIs.
-
- This internal function retrieves Smbus PPI from PPI database.
-
- @param VOID
-
- @return The pointer to Smbus PPI.
-
-**/
-EFI_PEI_SMBUS2_PPI *
-InternalGetSmbusPpi (
- VOID
- );
-
-/**
- Executes an SMBus operation to an SMBus controller.
-
- This function provides a standard way to execute Smbus script
- as defined in the SmBus Specification. The data can either be of
- the Length byte, word, or a block of data.
-
- @param SmbusOperation Signifies which particular SMBus hardware protocol
- instance that it will use to execute the SMBus transactions.
- @param SmBusAddress The address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Length Signifies the number of bytes that this operation will
- do. The maximum number of bytes can be revision specific
- and operation specific.
- @param Buffer Contains the value of data to execute to the SMBus slave
- device. Not all operations require this argument. The
- length of this buffer is identified by Length.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The actual number of bytes that are executed for this operation.
-
-**/
-UINTN
-InternalSmBusExec (
- IN EFI_SMBUS_OPERATION SmbusOperation,
- IN UINTN SmBusAddress,
- IN UINTN Length,
- IN OUT VOID *Buffer,
- OUT RETURN_STATUS *Status OPTIONAL
- );
-
-#endif