stash: remove documentation for `stash.useBuiltin`

In 8a2cd3f5123 (stash: remove the stash.useBuiltin setting, 2020-03-03),
we removed the setting, and for a couple of major versions, we still
documented the setting, telling users that it is gone.

We can now safely remove even the documentation.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/config/stash.txt b/Documentation/config/stash.txt
index 9ed775281fb34f4e7ce0f7277784b7d74164daa1..b9f609ed76b7f3ff41aef03ecf0ea22fd1d355ea 100644 (file)
--- a/Documentation/config/stash.txt
+++ b/Documentation/config/stash.txt
@@ -1,10 +1,3 @@
-stash.useBuiltin::
-       Unused configuration variable.  Used in Git versions 2.22 to
-       2.26 as an escape hatch to enable the legacy shellscript
-       implementation of stash.  Now the built-in rewrite of it in C
-       is always used. Setting this will emit a warning, to alert any
-       remaining users that setting this now does nothing.
-
 stash.showIncludeUntracked::
        If this is set to true, the `git stash show` command will show
        the untracked files of a stash entry.  Defaults to false. See