Fix ESLint errors

examples/ReactNativeBenchmarks/benchmarks.js

@@ -18,8 +18,9 @@
 
 'use strict';
 
+import React from 'react';
+
 import {
-    AppRegistry,
     Component,
     StyleSheet,
     Text,

tests/js/asserts.js

@@ -111,10 +111,12 @@ module.exports = {
     },
 
     isNode: function() {
+        // eslint-disable-next-line no-undef
         return typeof process == 'object' && Object.prototype.toString.call(process) == '[object process]';
     },
 
     isNode6: function() {
+        // eslint-disable-next-line no-undef
         return this.isNode() && process.version.indexOf('v6.') == 0;
     },
 };