Update README.md

Author: JacksonTian

README.md

@@ -2,15 +2,12 @@ English | [简体中文](/README-zh-CN.md)
 
 [![NPM version][npm-image]][npm-url]
 [![codecov][cov-image]][cov-url]
-[![David deps][david-image]][david-url]
 [![npm download][download-image]][download-url]
 
 [npm-image]: https://img.shields.io/npm/v/@darabonba/php-generator.svg?style=flat-square
 [npm-url]: https://npmjs.org/package/@darabonba/php-generator
 [cov-image]: https://codecov.io/gh/aliyun/darabonba-php-generator/branch/master/graph/badge.svg
 [cov-url]: https://codecov.io/gh/aliyun/darabonba-php-generator
-[david-image]: https://img.shields.io/david/aliyun/darabonba-php-generator.svg?style=flat-square
-[david-url]: https://david-dm.org/aliyun/darabonba-php-generator
 [download-image]: https://img.shields.io/npm/dm/@darabonba/php-generator.svg?style=flat-square
 [download-url]: https://npmjs.org/package/@darabonba/php-generator