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diff --git a/OldMdePkg/Library/BaseLib/Ia32/ReadDr4.asm b/OldMdePkg/Library/BaseLib/Ia32/ReadDr4.asm
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--- a/OldMdePkg/Library/BaseLib/Ia32/ReadDr4.asm
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@@ -1,47 +0,0 @@
-;------------------------------------------------------------------------------
-;
-; Copyright (c) 2006, Intel Corporation
-; 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.
-;
-; Module Name:
-;
-; ReadDr4.Asm
-;
-; Abstract:
-;
-; AsmReadDr4 function
-;
-; Notes:
-;
-;------------------------------------------------------------------------------
-
- .586p
- .model flat,C
- .code
-
-;------------------------------------------------------------------------------
-; UINTN
-; EFIAPI
-; AsmReadDr4 (
-; VOID
-; );
-;------------------------------------------------------------------------------
-AsmReadDr4 PROC
- ;
- ; DR4 is alias to DR6 only if DE (in CR4) is cleared. Otherwise, reading
- ; this register will cause a #UD exception.
- ;
- ; MS assembler doesn't support this instruction since no one would use it
- ; under normal circustances. Here opcode is used.
- ;
- DB 0fh, 21h, 0e0h
- ret
-AsmReadDr4 ENDP
-
- END