Remove incorrect changelog (#14099)

* Revert module version

* Remove incorrect changelog

Author: dingmeng-xue

src/BotService/Changelog.md

@@ -18,7 +18,6 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
-* Used the '3.0.414' version of autorest to generate code
 
 ## Version 0.1.0
 * First preview release for module Az.BotService