I would plant it out asap and resist the temptation of pruning off those potential branches until later in the year, once the tree is settled in and gotten over the transplanting shock.
At this time of the year, the sap will be rising or soon will be, so any cuts now are likely to bleed heavily and will leave it vulnerable to infection or at least, risking wastage of valuable energy.
Prune off the unwanted branches in Oct/ Nov when the tree is at the dormant stage and allow the air to dry off any fresh cuts, covering can actually encourage fungal growth and disease.