chore(readme): remove codacy badge

An analysis has not been performed for months and the result is not correct. Next task: create some solid style rules and reconfigure.

Author: zaldih

README.md

@@ -4,7 +4,6 @@
 </p>
 <p align="center">
 <img alt="npm" src="https://img.shields.io/npm/dy/npkill.svg">
-<a href="https://www.codacy.com/gh/voidcosmos/npkill/dashboard?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=voidcosmos/npkill&amp;utm_campaign=Badge_Grade"><img src="https://app.codacy.com/project/badge/Grade/cbd0bc6159674e44a3742ac9c28e15dd"/></a>
 <a href="#donations"><img src="https://img.shields.io/badge/donate-<3-red" alt="Donations Badge"/></a>
 <img alt="npm version" src="https://img.shields.io/npm/v/npkill.svg">
 <img alt="NPM" src="https://img.shields.io/npm/l/npkill.svg">