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diff --git a/OldMdePkg/Library/PeiSmbusLib/InternalSmbusLib.h b/OldMdePkg/Library/PeiSmbusLib/InternalSmbusLib.h
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index 58b093d039..0000000000
--- a/OldMdePkg/Library/PeiSmbusLib/InternalSmbusLib.h
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@@ -1,74 +0,0 @@
-/** @file
-Internal header file for Smbus library.
-
-Copyright (c) 2006, Intel Corporation<BR>
-All rights reserved. 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
-
-#define SMBUS_LIB_SLAVE_ADDRESS(SmBusAddress) (((SmBusAddress) >> 1) & 0x7f)
-#define SMBUS_LIB_COMMAND(SmBusAddress) (((SmBusAddress) >> 8) & 0xff)
-#define SMBUS_LIB_LENGTH(SmBusAddress) (((SmBusAddress) >> 16) & 0x3f)
-#define SMBUS_LIB_PEC(SmBusAddress) ((BOOLEAN) (((SmBusAddress) & SMBUS_LIB_PEC_BIT) != 0))
-#define SMBUS_LIB_RESEARVED(SmBusAddress) ((SmBusAddress) & ~(((1 << 22) - 2) | SMBUS_LIB_PEC_BIT))
-
-//
-// Declaration for internal functions
-//
-
-/**
- Gets Smbus PPIs.
-
- This internal function retrieves Smbus PPI from PPI database.
-
- @param PeiServices An indirect pointer to the EFI_PEI_SERVICES published by the PEI Foundation.
-
- @return The pointer to Smbus PPI.
-
-**/
-EFI_PEI_SMBUS_PPI *
-InternalGetSmbusPpi (
- EFI_PEI_SERVICES **PeiServices
- );
-
-/**
- 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 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