docs: update README

Author: exKAZUu

README.md

@@ -3,6 +3,4 @@
 [![Test](https://github.com/WillBooster/exercode-problem-utils/actions/workflows/test.yml/badge.svg)](https://github.com/WillBooster/exercode-problem-utils/actions/workflows/test.yml)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 
-[![Test](https://github.com/WillBooster/exercode-problem-utils/actions/workflows/test.yml/badge.svg)](https://github.com/WillBooster/exercode-problem-utils/actions/workflows/test.yml)
-
 :100: A set of utilities for judging programs on Exercode (https://exercode.willbooster.com/).