Re: [PATCH 2/8] builtin/gc: make `too_many_loose_objects()` reusable without GC config

> To decide whether or not a repository needs to be repacked we estimate
> the number of loose objects. If the number exceeds a certain threshold
> we perform the repack, otherwise we don't.
>
> This is done via `too_many_loose_objects()`, which takes as parameter
> the `struct gc_config`. This configuration is only used to determine the
> threshold. In a subsequent commit we'll add another caller of this
> function that wants to pass a different limit than the one stored in
> that structure.
>
> Refactor the function accordingly so that we only take the limit as
> parameter instead of the whole structure.