Remove unused isolate parameter from NumberToSize and TryNumberToSize

src/runtime/runtime-utils.h

Index: src/runtime/runtime-utils.h
diff --git a/src/runtime/runtime-utils.h b/src/runtime/runtime-utils.h
index 9982c53e1d1db3e4e4f43022a3cd79bf03ef6710..0d84354f4424d456a758a6c1e8ca182d2f598a96 100644
--- a/src/runtime/runtime-utils.h
+++ b/src/runtime/runtime-utils.h
@@ -51,7 +51,7 @@ namespace internal {
   CHECK(args[index]->IsNumber());                        \
   Handle<Object> name##_object = args.at<Object>(index); \
   size_t name = 0;                                       \
-  CHECK(TryNumberToSize(isolate, *name##_object, &name));
+  CHECK(TryNumberToSize(*name##_object, &name));
 
 // Call the specified converter on the object *comand store the result in
 // a variable of the specified type with the given name.  If the