I don't believe that deer will refuse to come in 'per say' when they smell freshly cut limbs.....but I do believe it will make them more cautious than they normally would be for a short period of time... Limbs fall out of trees all the time during storms and heavy winds, so it's not all that uncommon in a deer's world.
What I prefer to do when putting up a treestand during the season, or even before the season is this... when I cut limbs and branches I will drag them away from the stand site at least 40-50 yards and sometimes pile them up or use them to direct deer toward my stand site. If there is a way to create a small funnel by using cut branches, I will try to do that. It doesn't take much to make a deer change directions slightly by selectively placing foliage here and there.
If you need to trim out shooting lanes, by all means do it. Just drag the limbs away from your setup a little ways and pile them up, or use them to route the deer to you.