Remove references to twitter

readme.md

@@ -34,7 +34,6 @@ You can use the many existing plugins or you can make your own.
 
 * to learn markdown, see this [cheatsheet and tutorial][cheat]
 * for more about us, see [`unifiedjs.com`][site]
-* for updates, see [Twitter][]
 * for questions, see [support][]
 * to help, see [contribute][] or [sponsor][] below
 
@@ -605,8 +604,6 @@ Support this effort and give back by sponsoring on [OpenCollective][collective]!
 
 [cheat]: https://commonmark.org/help/
 
-[twitter]: https://twitter.com/unifiedjs
-
 [site]: https://unifiedjs.com
 
 [topic]: https://github.com/topics/remark-plugin