fix warning

src/router.js

@@ -5,9 +5,7 @@ import FetchPage from "./container/fetchPage";
 
 export default () => (
 	<Switch>
-		<div>
-			<Route path="/" exact component={App} />
-			<Route exact path="/fetch" component={FetchPage} />
-		</div>
+		<Route path="/" exact component={App} />
+		<Route exact path="/fetch" component={FetchPage} />
 	</Switch>
 );