Subject: bug#12450: Remove configure's --without-sync-input option.

From: Eli Zaretskii <[email-masked]>
Date: Mon, 17 Sep 2012 10:42:44 +0300

> Date: Sun, 16 Sep 2012 14:48:55 -0700
> From: Paul Eggert <[email-masked]>
> CC: [email-masked], [email-masked], [email-masked]
> 
> Since the patch is installed now I'm marking this bug as done.
> If bugs crop up we can reopen it or open a new bug report.

There are still a lot of comments in the code that describe the
non-SYNC_INPUT mode.  For example, see blockinput.h.