Revert "Subzero. ARM32. Initial sandboxing code."

tests_lit/assembler/x86/sandboxing.ll

 ; Tests basics and corner cases of x86-32 sandboxing, using -Om1 in
 ; the hope that the output will remain stable.  When packing bundles,
 ; we try to limit to a few instructions with well known sizes and
 ; minimal use of registers and stack slots in the lowering sequence.
 
-; RUN: %p2i -i %s --sandbox --filetype=obj --disassemble --args -Om1 \
+; RUN: %p2i -i %s --filetype=obj --disassemble --args -Om1 \
 ; RUN:   -allow-externally-defined-symbols \
-; RUN:   -ffunction-sections | FileCheck %s
+; RUN:   -ffunction-sections -sandbox | FileCheck %s
 
 declare void @call_target()
 @global_byte = internal global [1 x i8] zeroinitializer
 @global_short = internal global [2 x i8] zeroinitializer
 @global_int = internal global [4 x i8] zeroinitializer
 
 ; A direct call sequence uses the right mask and register-call sequence.
 define internal void @test_direct_call() {
 entry:
   call void @call_target()
@@ skipping 232 matching lines @@
   ret void
 }
 ; CHECK-LABEL: checkpoint_restore_stack_adjustment
 ; CHECK: sub esp,0x1c
 ; CHECK: call
 ; The address of %arg should be [esp+0x20], not [esp+0x30].
 ; CHECK-NEXT: mov [[REG:.*]],DWORD PTR [esp+0x20]
 ; CHECK-NEXT: mov DWORD PTR [esp],[[REG]]
 ; CHECK: call
 ; CHECK: add esp,0x1c