Fix lint errors

packages/stack/example/App.js

@@ -12,12 +12,12 @@ import ModalStack from './src/ModalStack';
 import LifecycleInteraction from './src/LifecycleInteraction';
 import GestureInteraction from './src/GestureInteraction';
 
-// Uncomment the following line to force RTL. Requires closing and re-opening
-// your app after you first load it with this option enabled.
-// I18nManager.forceRTL(true);
-
 // Comment the following two lines to stop using react-native-screens
 import { useScreens } from 'react-native-screens';
+
+// Uncomment the following line to force RTL. Requires closing and re-opening
+// your app after you first load it with this option enabled.
+I18nManager.forceRTL(false);
 useScreens();
 
 const data = [

packages/stack/example/src/GestureInteraction.js

@@ -5,18 +5,13 @@ import {
   InteractionManager,
   WebView,
   View,
-  StyleSheet,
 } from 'react-native';
 import { MapView } from 'expo';
-import { withNavigationFocus } from 'react-navigation';
 import {
   createStackNavigator,
   StackGestureContext,
 } from 'react-navigation-stack';
-import {
-  PanGestureHandler,
-  NativeViewGestureHandler,
-} from 'react-native-gesture-handler';
+import { NativeViewGestureHandler } from 'react-native-gesture-handler';
 
 const IndexScreen = ({ navigation }) => (
   <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>

packages/stack/example/src/ImageStack.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import { Dimensions, Button, Image, View, Text } from 'react-native';
+import { Dimensions, Button, Image, View } from 'react-native';
 import { createStackNavigator } from 'react-navigation-stack';
 import { FlatList, BorderlessButton } from 'react-native-gesture-handler';
 

packages/stack/example/src/LifecycleInteraction.js

@@ -1,11 +1,5 @@
 import React from 'react';
-import {
-  ActivityIndicator,
-  Button,
-  Text,
-  View,
-  StyleSheet,
-} from 'react-native';
+import { Button, Text, View, StyleSheet } from 'react-native';
 import { BarCodeScanner } from 'expo';
 import { withNavigationFocus } from 'react-navigation';
 import { createStackNavigator } from 'react-navigation-stack';