I don't know how to remove it. Some vans can be set and unset on the IDS. Some can't.
Like I said, some vehicles are set at factory and can't be unset. I haven't tried, but by doing a PCM update you may be able to set the speed limiter as off when the update is done.
I have heard of mappers being able to alter the software to remove the limiter but I don't know who has this facility.