Simplify layoutEffect

packages/react-router/lib/components.tsx

@@ -57,20 +57,10 @@ export function RouterProvider({
   fallbackElement,
   router,
 }: RouterProviderProps): React.ReactElement {
-  let [state, setState] = React.useState(router.state);
-
   // Need to use a layout effect here so we are subscribed early enough to
   // pick up on any render-driven redirects/navigations (useEffect/<Navigate>)
-  React.useLayoutEffect(() => {
-    return router.subscribe((newState) => {
-      setState((prevState) => {
-        if (prevState !== newState) {
-          return newState;
-        }
-        return prevState;
-      });
-    });
-  }, [router]);
+  let [state, setState] = React.useState(router.state);
+  React.useLayoutEffect(() => router.subscribe(setState), [router, setState]);
 
   let navigator = React.useMemo((): Navigator => {
     return {