emacs-28 ef4d216: Remove reference to variable obsolete since 24.1

[Stefan Kangas]

branch: emacs-28
commit ef4d216eb326478563e3cf931aeeb2dbc3566f12
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Remove reference to variable obsolete since 24.1
    
    * doc/emacs/custom.texi (Minibuffer Maps, Minibuffer Maps): Remove
    reference to variable 'minibuffer-local-filename-must-match-map',
    obsolete since 24.1.
---
 doc/emacs/custom.texi | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/doc/emacs/custom.texi b/doc/emacs/custom.texi
index 60e2d0a..a3d8a77 100644
--- a/doc/emacs/custom.texi
+++ b/doc/emacs/custom.texi
@@ -1700,7 +1700,6 @@ circumstances.
 @vindex minibuffer-local-completion-map
 @vindex minibuffer-local-must-match-map
 @vindex minibuffer-local-filename-completion-map
-@vindex minibuffer-local-filename-must-match-map
   The minibuffer has its own set of local keymaps; they contain various
 completion and exit commands.
 
@@ -1716,10 +1715,9 @@ just like @key{RET}.
 @code{minibuffer-local-must-match-map} is for strict completion and
 for cautious completion.
 @item
-@code{minibuffer-local-filename-completion-map} and
-@code{minibuffer-local-filename-must-match-map} are like the two
-previous ones, but they are specifically for file name completion.
-They do not bind @key{SPC}.
+@code{minibuffer-local-filename-completion-map} is like the two
+previous ones, but specifically for file name completion.
+It does not bind @key{SPC}.
 @end itemize
 
 By default, @key{TAB}, @key{SPC} and @key{?} do completion in