chore: remove unavailable codebeat badge

Author: sheepzh

README.md

@@ -1,7 +1,6 @@
 # Time Tracker for Browser
 
 [![codecov](https://codecov.io/gh/sheepzh/timer/branch/main/graph/badge.svg?token=S98QSBSKCR&style=flat-square)](https://codecov.io/gh/sheepzh/timer)
-[![codebeat badge](https://codebeat.co/badges/b26df573-8143-4a53-8617-1e1eb4fe7b86)](https://codebeat.co/projects/github-com-sheepzh-timer-main)
 [![](https://img.shields.io/badge/license-Anti%20996-blue)](https://github.com/996icu/996.ICU)
 [![](https://img.shields.io/github/v/release/sheepzh/timer)](https://github.com/sheepzh/timer/releases)
 [![Crowdin](https://badges.crowdin.net/timer-chrome-edge-firefox/localized.svg)](https://crowdin.com/project/timer-chrome-edge-firefox)