ArmPkg: Removed deprecated 'ArmMPCoreMailBoxLib'

This library has been replaced by ArmMpCoreInfo PPI and HOBs.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12424 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Include/Library/ArmMPCoreMailBoxLib.h

@@ -1,22 +0,0 @@
-/** @file
-*
-*  Copyright (c) 2011, 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 _ARM_MPCORE_MAILBOX_LIB_H_
-#define _ARM_MPCORE_MAILBOX_LIB_H_
-
-VOID ArmClearMPCoreMailbox(VOID);
-
-UINTN ArmGetMPCoreMailbox(VOID);
-
-#endif