I would wait until summer as the wounds will heal more quickly . Honestly though, it really doesn't matter much in this case. If they are small insignificant twigs and not part of the structural nature of the tree--off with them.

MJH

I prune significant branches in early spring, just before the tree begins growth, for two reasons. A) Wound closure starts as soon as tree begins growth in spring, and though wound closure is slower until leaves are mature, it gives a head start on closing the wound more quickly than pruning at any other time. B) The tree will use a portion of its stored energy to build leaves on the branch(es) you intend to prune, only to be wasted when you remove them, along with the branch, later. Pruning before the energy goes into making leaves allows the tree to redirect stored energy toward other needs (branch extension, making leaves, fighting insects or pathogens, etc) or to just increase biomass. I agree with MJH, that pruning twigs from the stem is of little significance.

Al

I always try to prune in the winter when possible. The only problem with pruning a maple now is that some species -- particularly sugar maples -- have a lot of sap flowing in early spring. I pruned some of my sugar maples a few weeks ago and a lot of sap drained out over the next couple of days, but they seem to be fine now.