Re-reland: Remove register index/code indirection

src/arm64/simulator-arm64.h

Index: src/arm64/simulator-arm64.h
diff --git a/src/arm64/simulator-arm64.h b/src/arm64/simulator-arm64.h
index 6ff0013ebd954cef18ba161352c50e7aa54c8de1..63ebb4675a50b7ea329bda0eb0d99ef1d8cfe46e 100644
--- a/src/arm64/simulator-arm64.h
+++ b/src/arm64/simulator-arm64.h
@@ -17,12 +17,6 @@
 #include "src/globals.h"
 #include "src/utils.h"
 
-#define REGISTER_CODE_LIST(R)                                                  \
-R(0)  R(1)  R(2)  R(3)  R(4)  R(5)  R(6)  R(7)                                 \
-R(8)  R(9)  R(10) R(11) R(12) R(13) R(14) R(15)                                \
-R(16) R(17) R(18) R(19) R(20) R(21) R(22) R(23)                                \
-R(24) R(25) R(26) R(27) R(28) R(29) R(30) R(31)
-
 namespace v8 {
 namespace internal {