Make dired-get-subdir-min obsolete

* lisp/dired.el (dired-get-subdir-min): Redefine as obsolete function
alias for 'cdr'.  (Bug#11571)
(dired-get-subdir, dired-get-subdir-max, dired-clear-alist)
(dired-next-subdir, dired-current-directory):
* lisp/dired-aux.el (dired-rename-subdir-2)
(dired-alist-sort, dired-insert-subdir-del)
(dired-insert-subdir-doupdate, dired-goto-subdir)
(dired-hide-subdir, dired-hide-all): Use 'cdr' instead of
the above obsolete function.
(dired-subdir-alist): Doc fix.

Co-authored-by: Drew Adams <drew.adams@oracle.com>
1 job for master in 90 minutes and 3 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
failed #4179
test-all

01:30:03

 
Name Stage Failure
failed
test-all Test The script exceeded the maximum execution time set for the job
make -C test check-expensive
make[1]: Entering directory '/builds/emacs/emacs/test'
rm -f ./*.tmp
make[2]: Entering directory '/builds/emacs/emacs/test'
make[3]: Entering directory '/builds/emacs/emacs/test'
ELC lisp/net/tramp-tests.elc
GEN lisp/net/tramp-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-d0b76032 ...
ERROR: Job failed: execution took longer than 1h30m0s seconds