As far as I can tell, it was never used outside of dired-smart-shell-command.
It doesn't seem worth keeping around as a separate function.
* lisp/dired-x.el (dired-default-directory-alist, dired-default-directory):
Mark as obsolete.
(dired-smart-shell-command): Just call dired-current-directory.
* doc/misc/dired-x.texi (Multiple Dired Directories): Remove mentions
of dired-default-directory-alist and dired-default-directory.
Move dired-smart-shell-command here...
(Miscellaneous Commands): ... from here.
* lisp/dired-x.el (dired-omit-here-always): Make it obsolete.
* doc/misc/dired-x.texi (Omitting Variables): Refer to add-dir-local-variable
instead of the obsoleted dired-omit-here-always.
* lisp/dired.el (dired-mode): Call hack-dir-local-variables-non-file-buffer.
* lisp/dired-x.el (dired-omit-mode): Safe if boolean.
(dired-enable-local-variables): Fix doc and custom type. Mark risky.
(dired-enable-local-variables, dired-local-variables-file)
(dired-hack-local-variables): Make obsolete.
(dired-omit-here-always): Use dir-locals.el instead.
* doc/misc/dired-x.texi (Features): Don't advertise obsolete local variables.
Simplify layout.
(Omitting Variables): Update local variables example.
(Local Variables): Say this is obsolete. Fix description of
dired-enable-local-variables possible values.
* etc/NEWS: Relocate the existing entry about directory local
variables in file-les buffers, and make it clearer.
Mention above dired changes.
ada-mode.texi: Sync @dircategory with ../../info/dir.
auth.texi: Sync @dircategory with ../../info/dir.
autotype.texi: Sync @dircategory with ../../info/dir.
calc.texi: Sync @dircategory with ../../info/dir.
cc-mode.texi: Sync @dircategory with ../../info/dir.
cl.texi: Sync @dircategory with ../../info/dir.
dbus.texi: Sync @dircategory with ../../info/dir.
dired-x.texi: Sync @dircategory with ../../info/dir.
ebrowse.texi: Sync @dircategory with ../../info/dir.
ede.texi: Sync @dircategory with ../../info/dir.
ediff.texi: Sync @dircategory with ../../info/dir.
edt.texi: Sync @dircategory with ../../info/dir.
eieio.texi: Sync @dircategory with ../../info/dir.
emacs-mime.texi: Sync @dircategory with ../../info/dir.
epa.texi: Sync @dircategory with ../../info/dir.
erc.texi: Sync @dircategory with ../../info/dir.
eshell.texi: Sync @dircategory with ../../info/dir.
eudc.texi: Sync @dircategory with ../../info/dir.
flymake.texi: Sync @dircategory with ../../info/dir.
forms.texi: Sync @dircategory with ../../info/dir.
gnus.texi: Sync @dircategory with ../../info/dir.
idlwave.texi: Sync @dircategory with ../../info/dir.
mairix-el.texi: Sync @dircategory with ../../info/dir.
message.texi: Sync @dircategory with ../../info/dir.
mh-e.texi: Sync @dircategory with ../../info/dir.
newsticker.texi: Sync @dircategory with ../../info/dir.
nxml-mode.texi: Sync @dircategory with ../../info/dir.
org.texi: Sync @dircategory with ../../info/dir.
pcl-cvs.texi: Sync @dircategory with ../../info/dir.
pgg.texi: Sync @dircategory with ../../info/dir.
rcirc.texi: Sync @dircategory with ../../info/dir.
reftex.texi: Sync @dircategory with ../../info/dir.
remember.texi: Sync @dircategory with ../../info/dir.
sasl.texi: Sync @dircategory with ../../info/dir.
sc.texi: Sync @dircategory with ../../info/dir.
semantic.texi: Sync @dircategory with ../../info/dir.
ses.texi: Sync @dircategory with ../../info/dir.
sieve.texi: Sync @dircategory with ../../info/dir.
smtpmail.texi: Sync @dircategory with ../../info/dir.
speedbar.texi: Sync @dircategory with ../../info/dir.
trampver.texi [emacs]: Set emacsname to "Emacs".
tramp.texi: Sync @dircategory with ../../info/dir.
url.texi: Sync @dircategory with ../../info/dir.
vip.texi: Sync @dircategory with ../../info/dir.
viper.texi: Sync @dircategory with ../../info/dir.
widget.texi: Sync @dircategory with ../../info/dir.
woman.texi: Sync @dircategory with ../../info/dir.
* doc/misc/dired-x.texi: Use emacsver.texi to get Emacs version.
* doc/misc/Makefile.in ($(infodir)/dired-x, dired-x.dvi, dired-x.pdf):
Depend on emacsver.texi.
* lisp/dired-x.el (dired-bind-jump, dired-bind-man, dired-bind-info):
Doc fixes. Add :set property, replacing top-level calls.
(dired-vm-read-only-folders, dired-vm): Doc fix (drop v. old VM 4).
(dired-guess-shell-gnutar): Test tar version rather than system-type.
(dired-extra-startup, dired-man, dired-info): Doc fixes.
(dired-clean-up-after-deletion): Use when and dolist.
(dired-jump): Use unless and when.
(dired-virtual): Use line-end-position.
(dired-default-directory-alist): Rename from default-directory-alist.
(dired-default-directory): Update for above name change.
(dired-vm): Drop VM < 5 and simplify.
(dired-buffer-more-recently-used-p): Rewrite.
(dired-filename-at-point): Use when and or.
(dired-x-read-filename-at-point): Rename from read-filename-at-point.
Update callers.
* doc/misc/dired-x.texi (Multiple Dired Directories): Update for rename of
default-directory-alist.
(Miscellaneous Commands): No longer mention very old VM version 4.
* doc/misc/dired-x.texi: Drop meaningless version number.
(Introduction): Remove old info.
(Optional Installation Dired Jump): Autoload from dired-x.
Remove incorrect info about loaddefs.el.
(Bugs): Just refer to M-x report-emacs-bug.
