Remove octokit maintenance warning (github#28496)

remove warning about octokit not being maintained

Author: Sarah Edwards

content/rest/overview/libraries.md

@@ -24,12 +24,6 @@ topics:
   </div>
 </div>
 
-{% warning %}
-
-Warning: As of late October 2021, the official Octokit libraries are not currently maintained. For more information, see [this discussion in the octokit.js repository](https://github.com/octokit/octokit.js/discussions/620).
-
-{% endwarning %}
-
 # Third-party libraries
 
 ### Clojure