Updated .eslintrc for test files

Author: zoltantothcom

.eslintrc

@@ -3,7 +3,7 @@
   "extends": "react",
   "env": {
     "browser": true,
-    "node": true
+    "jest": true
   },
   "settings": {
     "react": {

__tests__/Layout.test.js

@@ -1,7 +1,4 @@
-/* eslint-disable */
-
 import React from 'react';
-import ReactDOM from 'react-dom';
 import { shallow } from 'enzyme';
 
 import Layout from '../src/Layout';