(sit-for): Remove support for old calling convention

* lisp/subr.el (sit-for): Remove support for old calling convention

* doc/lispref/functions.texi (Obsolete Functions): Adjust wording now
that we don't support `sit-for`s old convention any more.
* doc/lispref/commands.texi (Waiting): Remove mention of old calling
convention for `sit-for`.

2 files changed, 2 insertions, 6 deletions

diff --git a/doc/lispref/commands.texi b/doc/lispref/commands.texi
index 6601135cb85..fdf5ec1d7fe 100644
--- a/doc/lispref/commands.texi
+++ b/doc/lispref/commands.texi
@@ -3967,10 +3967,6 @@ the timeout elapses).
 In batch mode (@pxref{Batch Mode}), @code{sit-for} cannot be
 interrupted, even by input from the standard input descriptor.  It is
 thus equivalent to @code{sleep-for}, which is described below.
-
-It is also possible to call @code{sit-for} with three arguments,
-as @code{(sit-for @var{seconds} @var{millisec} @var{nodisp})},
-but that is considered obsolete.
 @end defun
 
 @defun sleep-for seconds &optional millisec
diff --git a/doc/lispref/functions.texi b/doc/lispref/functions.texi
index 236b823e7e6..ba0d919549b 100644
--- a/doc/lispref/functions.texi
+++ b/doc/lispref/functions.texi
@@ -2364,8 +2364,8 @@ accepted three arguments, like this
   (sit-for seconds milliseconds nodisp)
 @end example
 
-However, calling @code{sit-for} this way is considered obsolete
-(@pxref{Waiting}).  The old calling convention is deprecated like
+During a transition period, the function accepted those three
+arguments, but declared this old calling convention as deprecated like
 this:
 
 @example