Not that that mattered, Remus supposes, exchanging a look with Sirius, if Harry is no longer there. If Harry was abandoned by the Dursleys, then the blood wards would have fallen; since Lily has no other known blood relatives, Harry has no such protections any longer and will not be able to regain it, unless for some reason Petunia takes him back and they are able to recreate the spell. Since the woman left the boy in the first place, Remus has no desire for her to take him back, and knows Sirius feels the same.