I have a big pin oak in my front yard I don't think it has ever been pruned... this year there is a lot of dead wood in it that needs to be taken out (not a health thing just some branches on the interior of the canopy that couldn't hack it) they are threatening to cars in the driveway and I don't want to wake up to a branch through my windshield... my question is is it safe to at least dead wood the tree now? I know it is best to prune in the winter but that time has passed.