Update README.md

Author: khoih-prog

README.md

@@ -6,8 +6,6 @@
 [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
 [![GitHub issues](https://img.shields.io/github/issues/khoih-prog/ESP_AT_WiFiManager.svg)](http://github.com/khoih-prog/ESP_AT_WiFiManager/issues)
 
-[![arduino-library-badge](https://www.ardu-badge.com/badge/ESP_AT_WiFiManager.svg?)](https://www.ardu-badge.com/ESP_AT_WiFiManager)
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 ### New Version v1.0.1