If you are only planting a few, I would remove early branching as soon as possible. They can clog tubes and restrict airflow which can cause problems. However, I'm planting way to many to be able to do that. I do try to prune early branching as I grow them in rootmakers. I prefer to get them taller rather than early branching. I try to prune those early branches as soon as possible so I'm only taking a small percentage of leaves from the tree when it is actively growing. By fall, I can have trees sticking a foot out of the tube before they branch. Even when I have smaller trees, once in the tube, they are on their own. I can't say I've had significant problems from not removing tubes and pruning.
Thanks,
Jack