* info/gnus.info: Remove `gnus-treat-play-sounds' from manual. According to lisp/gnus/ChangeLog.3 this variable was removed in 2010 (bug#53192).
* info/gnus.info: Remove `gnus-treat-play-sounds' from manual. According to lisp/gnus/ChangeLog.3 this variable was removed in 2010 (bug#53192).