removeToast in ToastProvider component (part of post https://aibolik.github.io/blog/creating-toast-api-with-react-hooks)

ToastProvider-removeToast.jsx

const ToastProvider = ({ children }) => {
  // ...

  const addToast = useCallback(content => {
    setToasts(toasts => [
      ...toasts,
      { id: id++, content }
    ]);
  }, [setToasts]);

  const removeToast = useCallback(id => {
    setToasts(toasts => toasts.filter(t => t.id !== id));
  }, [setToasts]);
  
  // ...
}