chore: remove test badge (#1831)

Author: wlee221

README.md

@@ -6,7 +6,6 @@
 
 [![GitHub](https://img.shields.io/github/license/aws-amplify/amplify-ui)](LICENSE)
 [![Discord](https://img.shields.io/discord/308323056592486420?logo=discord)](https://discord.gg/jWVbPfC)
-[![Tests](https://github.com/aws-amplify/amplify-ui/actions/workflows/tests.yml/badge.svg)](https://github.com/aws-amplify/amplify-ui/actions/workflows/tests.yml)
 [![Open Bugs](https://img.shields.io/github/issues/aws-amplify/amplify-ui/bug?color=d73a4a&label=bugs)](https://github.com/aws-amplify/amplify-ui/issues?q=is%3Aissue+is%3Aopen+label%3Abug)
 [![Feature Requests](https://img.shields.io/github/issues/aws-amplify/amplify-ui/feature-request?color=ff9001&label=feature%20requests)](https://github.com/aws-amplify/amplify-ui/issues?q=is%3Aissue+label%3Afeature-request+is%3Aopen)
 [![GA milestone](https://img.shields.io/github/milestones/progress-percent/aws-amplify/amplify-ui/1)](https://github.com/aws-amplify/amplify-ui/milestone/1)