[PATCH 15/15] doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup

[Fernando Ramos]

> Can we remove drm_modeset_lock_all[_ctx] now? If so, let's queue that up as part
> of the set.
> 

drm_modeset_lock_all() and drm_modeset_unlock_all() can be removed (I'll do that
on v2 of this patch series).

drm_modset_lock_all_ctx() is a different story and there are still two places
(one in the i915 driver and another one in the amd driver) where they are
needed.

I would need to understand the code better before trying to remove those :)