README.md document broken

[snowman]

$ git show -p 46068abcd0e694556057733be11498c53cbc6e50

commit 46068abcd0e694556057733be11498c53cbc6e50
Author: conao3 <conao3@gmail.com>
Date:   Wed Jul 1 12:17:46 2020 +0900

    remove mentioning real-auto-save-use-idle-timer config

diff --git a/README.md b/README.md
index 55e66a6..72ccdd8 100644
--- a/README.md
+++ b/README.md
@@ -32,10 +32,7 @@ For example, to use this mode only for org files, add this to your Emacs config:
 
 By default, real-auto-save mode uses idle timer. If your emacs is idle, after `real-auto-save-interval` seconds it will save buffers.
 
-If you want to save all your buffers, every `real-auto-save-interval` seconds, irrespective of idle time, use
-
-    (setq real-auto-save-use-idle-timer nil)
-
+If you want to save all your buffers, every `real-auto-save-interval` seconds.
 
 ## Acknowledgments

[conao3]

Thanks, please create PR?