doc: remove CII badge in README

PR-URL: #18908
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

README.md

@@ -3,9 +3,6 @@
     <img alt="Node.js" src="https://nodejs.org/static/images/logo-light.svg" width="400"/>
   </a>
 </p>
-<p align="center">
-  <a title="CII Best Practices" href="https://bestpractices.coreinfrastructure.org/projects/29"><img src="https://bestpractices.coreinfrastructure.org/projects/29/badge"></a>
-</p>
 
 Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. For
 more information on using Node.js, see the