diff --git a/ArmPkg/Include/Chipset/ArmCortexA5x.h b/ArmPkg/Include/Chipset/ArmCortexA5x.h
deleted file mode 100644
index cc8b23b964..0000000000
--- a/ArmPkg/Include/Chipset/ArmCortexA5x.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/** @file
-
-  Copyright (c) 2012 - 2021, Arm Limited. All rights reserved.<BR>
-
-  SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#ifndef ARM_CORTEX_A5X_H_
-#define ARM_CORTEX_A5X_H_
-
-//
-// Cortex A5x feature bit definitions
-//
-#define A5X_FEATURE_SMP  (1 << 6)
-
-//
-// Helper functions to access CPU Extended Control Register
-//
-UINT64
-EFIAPI
-ArmReadCpuExCr (
-  VOID
-  );
-
-VOID
-EFIAPI
-ArmWriteCpuExCr (
-  IN  UINT64  Val
-  );
-
-VOID
-EFIAPI
-ArmSetCpuExCrBit (
-  IN  UINT64  Bits
-  );
-
-VOID
-EFIAPI
-ArmUnsetCpuExCrBit (
-  IN  UINT64  Bits
-  );
-
-#endif // ARM_CORTEX_A5X_H_