ArmPkg: Remove RVCT support

RVCT is obsolete and no longer used.
Remove support for it.

Signed-off-by: Rebecca Cran <quic_rcran@quicinc.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>

ArmPkg/Library/ArmSvcLib/Arm/ArmSvc.asm

@@ -1,36 +0,0 @@
-//
-//  Copyright (c) 2016 - 2020, ARM Limited. All rights reserved.
-//
-//  SPDX-License-Identifier: BSD-2-Clause-Patent
-//
-//
-
-
-    INCLUDE AsmMacroExport.inc
-
- RVCT_ASM_EXPORT ArmCallSvc
-    // r0 will be popped just after the SVC call
-    push     {r0, r4-r8}
-
-    // Load the SVC arguments values into the appropriate registers
-    ldm     r0, {r0-r7}
-
-    svc     #0
-    // Prevent speculative execution beyond svc instruction
-    dsb     nsh
-    isb
-
-    // Load the ARM_SVC_ARGS structure address from the stack into r8
-    ldr     r8, [sp]
-
-    // Load the SVC returned values into the appropriate registers
-    // A SVC call can return up to 4 values - we do not need to store back r4-r7.
-    stm     r8, {r0-r3}
-
-    mov     r0, r8
-
-    // Restore the registers r4-r8
-    pop     {r1, r4-r8}
-    bx      lr
-
-    END