doc: remove discord community

PR-URL: #26830
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Anto Aravinth <[email protected]>
Reviewed-By: Shelley Vohr <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Yongsheng Zhang <[email protected]>

Author: aymen94

README.md

@@ -51,7 +51,6 @@ resources:
 
 * [Questions tagged 'node.js' on StackOverflow][]
 * [#node.js channel on chat.freenode.net][]
-* [Node.js Discord Community](https://discordapp.com/invite/v7rrPdE)
 * [Node.js Slack Community](https://node-js.slack.com/)
   * To register: [nodeslackers.com](http://www.nodeslackers.com/)