Shorten onScroll effect

Author: lorensr

src/components/ReviewList.js

@@ -31,9 +31,7 @@ export default ({ orderBy }) => {
 
   useEffect(() => {
     window.addEventListener('scroll', onScroll)
-    return () => {
-      window.removeEventListener('scroll', onScroll)
-    }
+    return () => window.removeEventListener('scroll', onScroll)
   }, [onScroll])
 
   return (