Hello. Welcome to Just Answer.
Since you don't have a ground wire in the fixture box, that obviously gives you nothing (substantial) to connect the fixture's ground wire to. In these cases, it doesn't really matter what you do with the fixture's ground wire. Connecting it to the bracket doesn't ground the fixture, unless the junction box is metal, and is somehow grounded (possibly by a metal flexible conduit containing the circuit wires).
However, it won't hurt anything to go ahead and connect it to the green screw on the bracket. That's not a bad way to go, as it immobilizes the fixture's ground wire, and keeps it from accidentally working its way into one of the other splices.
it is a metal box and has 2 screws inside but are not green..i just feel weird leaving it "hang"
just wanted to double check before i completed project thank you so much
I understand. Since the box is metal, it could be connected by conduit that you can't see. That would mean the box is grounded, and using the screw on the bracket is the best way to go.
Happy to help. Thank you.
have a great night
You do the same. Take care.