If they are located in a place where you want a tree, I would keep the Sassafras and Redbud. But the wild Grape is nothing but a weed, the fruit produced does nothing but feed the birds (which isn't a bad thing but they will poop them out later spreading it around).
If you jerk out the Sassafras try to get as much roots as possible. You can make old fashion Sasparilla or tea with them. I regularity pull up Sassafras seedlings so my daughter can enjoy the roots.