[RFC] remove target_acknowledge_created_inferior

[Joel Brobecker]

> The details of target_create_inferior/fork_child changed enough since
> this was needed, that I don't think it's necessary anywhere anymore.
> A target can just call whatever it would place there after fork_inferior
> returning.  I say just go for it.  Easy to add back if proven necessary.

Thanks! This makes sense to me too, so I checked the patch in.

-- 
Joel