[cleanup] Drop unused scratch register from {load,store}_calling_convention

src/ic/arm64/access-compiler-arm64.cc

Index: src/ic/arm64/access-compiler-arm64.cc
diff --git a/src/ic/arm64/access-compiler-arm64.cc b/src/ic/arm64/access-compiler-arm64.cc
index 892ce85dfbdc4a927ed2e9766ce1093426935b3d..62736338226f6401825591f0856901d3f8d10b7c 100644
--- a/src/ic/arm64/access-compiler-arm64.cc
+++ b/src/ic/arm64/access-compiler-arm64.cc
@@ -26,19 +26,19 @@ void PropertyAccessCompiler::GenerateTailCall(MacroAssembler* masm,
 // we use the same assignments as ARM to remain on the safe side.
 
 Register* PropertyAccessCompiler::load_calling_convention() {
-  // receiver, name, scratch1, scratch2, scratch3, scratch4.
+  // receiver, name, scratch1, scratch2, scratch3.
   Register receiver = LoadDescriptor::ReceiverRegister();
   Register name = LoadDescriptor::NameRegister();
-  static Register registers[] = {receiver, name, x3, x0, x4, x5};
+  static Register registers[] = {receiver, name, x3, x0, x4};
   return registers;
 }
 
 
 Register* PropertyAccessCompiler::store_calling_convention() {
-  // receiver, value, scratch1, scratch2, scratch3.
+  // receiver, value, scratch1, scratch2.
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register name = StoreDescriptor::NameRegister();
-  static Register registers[] = {receiver, name, x3, x4, x5};
+  static Register registers[] = {receiver, name, x3, x4};
   return registers;
 }