Function removeFromCartHandler

frontend/src/screens/CartScreen.js:14–16

(productId)

  const qty = props.location.search ? Number(props.location.search.split("=")[1]) : 1;
  const dispatch = useDispatch();
  const removeFromCartHandler = (productId) => {
    dispatch(removeFromCart(productId));
  }
  useEffect(() => {
    if (productId) {
      dispatch(addToCart(productId, qty));