removed duplicate assignment from rigidbody_add_contact

src/rigidbody.c

@@ -49,7 +49,6 @@ void rigidbody_add_contact(RigidBody* self, Collision hit) {
     list_foreach(Contact, contact, &self->contacts) {
         if(contact->hit.other.data == hit.other.data) {
             ++contact->expiry;
-            hit.velocity = contact->hit.velocity;
             contact->hit = hit;
             contact->duration += delta_time();
             return;