As for dead limbs still attached to trees, you shouldn't remove them either. Dead limbs on a pine on #10 at Ann Mo in Boise help prevent a lot of discs from flying into the parking lot. And a few large dead limbs on a pine at #16 Pier Park Portland really "nices" many a shot, just when you think you've got it made. The exuberant-to-crestfallen visages are worth the price of admission all by themselves.
If you didn't install the course, and you don't have explicit permission from the parks dept., LEAVE IT ALONE.
If you didn't install the course, and you don't have explicit permission from the parks dept., LEAVE IT ALONE.