ArmPkg: remove ArmCpuLib header and implementations

Remove ArmCpuLib entirely. It is no longer used.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

ArmPkg/Include/Library/ArmCpuLib.h

@@ -1,28 +0,0 @@
-/** @file
-
-  Copyright (c) 2011-2012, ARM Limited. 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 __ARMCPU_LIB__
-#define __ARMCPU_LIB__
-
-VOID
-ArmCpuSetup (
-  IN  UINTN         MpId
-  );
-
-VOID
-ArmCpuSetupSmpNonSecure (
-  IN  UINTN         MpId
-  );
-
-#endif // __ARMCPU_LIB__