Switch to builtin Org mode version 9.7.3

README.org

@@ -290,9 +290,8 @@ of [[info:emacs#Saving Customizations][saving customizations (info)]].
 #+name: lst:3rd-setopt-call
 #+begin_src emacs-lisp -n :results silent
 ;; To use different Org git repositories (org or gro):
-(push (expand-file-name "~/VCS/org-mode/lisp") load-path)
-(push (expand-file-name "~/VCS/org-contrib/lisp") load-path)
-;; Postpone (require 'org) after shadowing Org and sh-script faces below.
+;; (push (expand-file-name "~/VCS/org-mode/lisp") load-path)
+;; Postpone loading Org after shadowing Org and sh-script faces below.
 
 (when (eq system-type 'darwin)
   ;; Failed to initialize color list unarchiver: ...
@@ -350,7 +349,6 @@ version.
     ;; Install and require `no-littering'.
     (package-install 'no-littering)
     (require 'no-littering)
-    ;; (package-upgrade 'org) ; Use builtin or git!
     ;; Install the selected packages.
     (package-install-selected-packages)))
 
@@ -558,8 +556,6 @@ verse and quote blocks are fontified using the `org-verse' and
      (:weight bold)))
   "My face to show a here-document."
   :group 'sh-indentation)
-
-(require 'org)
 #+end_src
 
 #+caption[Use =buffer-face-mode= to set fixed or variable pitch face]:
@@ -1082,7 +1078,7 @@ looks for files.
                (directory-files-recursively package-user-dir "\\.info\\'"))))
       (add-to-list 'Info-directory-list path nil #'file-equal-p)))
   ;; Make Emacs find the git Org info files.
-  (push (expand-file-name "~/VCS/org-mode/doc") Info-directory-list)
+  ;; (push (expand-file-name "~/VCS/org-mode/doc") Info-directory-list)
   ;; Make Emacs find Python info files.
   (push (expand-file-name "~/.local/share/info") Info-directory-list))
 #+end_src