Fixes empty `state` argument in compute_single_action method (#6894)
Fixes empty `state` argument in compute_single_action method (#6894)

* Fixes empty `state` parameter in compute_single_action method

* Fixed style

ray-project/ray,pcmoritz/ray-1,richardliaw/ray,richardliaw/ray,robertnishihara/ray,richardliaw/ray,robertnishihara/ray,stephanie-wang/ray,stephanie-wang/ray,stephanie-wang/ray,robertnishihara/ray,robertnishihara/ray,richardliaw/ray,pcmoritz/ray-1,stephanie-wang/ray,richardliaw/ray,richardliaw/ray,stephanie-wang/ray,pcmoritz/ray-1,robertnishihara/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,stephanie-wang/ray,pcmoritz/ray-1,robertnishihara/ray,richardliaw/ray,robertnishihara/ray,stephanie-wang/ray,robertnishihara/ray,pcmoritz/ray-1,ray-project/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,stephanie-wang/ray,ray-project/ray,stephanie-wang/ray,ray-project/ray,ray-project/ray,richardliaw/ray,robertnishihara/ray