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diff --git a/board/MAI/bios_emulator/scitech/include/mtrr.h b/board/MAI/bios_emulator/scitech/include/mtrr.h
deleted file mode 100644
index b29812c928..0000000000
--- a/board/MAI/bios_emulator/scitech/include/mtrr.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/****************************************************************************
-*
-* SciTech OS Portability Manager Library
-*
-* ========================================================================
-*
-* The contents of this file are subject to the SciTech MGL Public
-* License Version 1.0 (the "License"); you may not use this file
-* except in compliance with the License. You may obtain a copy of
-* the License at http://www.scitechsoft.com/mgl-license.txt
-*
-* Software distributed under the License is distributed on an
-* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
-* implied. See the License for the specific language governing
-* rights and limitations under the License.
-*
-* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
-*
-* The Initial Developer of the Original Code is SciTech Software, Inc.
-* All Rights Reserved.
-*
-* ========================================================================
-*
-* Language: ANSI C
-* Environment: Any
-*
-* Description: Include file defining the external ring 0 helper functions
-* needed by the MTRR module. These functions may be included
-* directly for native ring 0 device drivers, or they may
-* be calls down to a ring 0 helper device driver where
-* appropriate (or the entire MTRR module may be located in
-* the device driver if the device driver is 32-bit).
-*
-****************************************************************************/
-
-#ifndef __MTRR_H
-#define __MTRR_H
-
-#include "scitech.h"
-
-/*--------------------------- Function Prototypes -------------------------*/
-
-#ifdef __cplusplus
-extern "C" { /* Use "C" linkage when in C++ mode */
-#endif
-
-/* Internal functions (requires ring 0 access or helper functions!) */
-
-void MTRR_init(void);
-int MTRR_enableWriteCombine(ulong base,ulong size,uint type);
-
-/* External assembler helper functions */
-
-ibool _ASMAPI _MTRR_isRing0(void);
-ulong _ASMAPI _MTRR_disableInt(void);
-void _ASMAPI _MTRR_restoreInt(ulong flags);
-ulong _ASMAPI _MTRR_saveCR4(void);
-void _ASMAPI _MTRR_restoreCR4(ulong cr4Val);
-uchar _ASMAPI _MTRR_getCx86(uchar reg);
-void _ASMAPI _MTRR_setCx86(uchar reg,uchar data);
-#ifdef __16BIT__
-void _ASMAPI _MTRR_readMSR(ulong reg, ulong far *eax, ulong far *edx);
-#else
-void _ASMAPI _MTRR_readMSR(ulong reg, ulong *eax, ulong *edx);
-#endif
-void _ASMAPI _MTRR_writeMSR(ulong reg, ulong eax, ulong edx);
-
-#ifdef __cplusplus
-} /* End of "C" linkage for C++ */
-#endif
-
-#endif /* __MTRR_H */