Remove ARB from official rom

[gulp79]

Hi all,
if i want to test the Global Dev rom for my MI 8 Dipper (just to test the ok google fix that is available atm only on global dev 8.11.23 rom) without enabling ARB, what i've to remove from official ROM zip file?

Is enough to remove the android bootloader file "/firmware-update/abl.elf" ?

Thanks for any infos!