limpia codigo

src/navigator/MainStackNavigator.tsx

@@ -1,6 +1,5 @@
-import { FC, useContext, useState } from 'react'
+import { FC, useContext } from 'react'
 
-import AsyncStorage from '@react-native-async-storage/async-storage';
 import { LoginScreen } from '../screens/login/LoginScreen';
 import { TabScreen } from './TabScreen';