[BUG] org-contrib/org-static-mathjax is not operational [9.7-pre (release_9.6.18-1153-gee395b.dirty @ /home/yantar92/.emacs.d/straight/build/org/)]

[Ihor Radchenko]

Hello,

It looks like org-static-mathjax.el from org-contrib is not operational
for many years. When I look at byte-compiler warnings, I see a number of
references to variables that are long gone:

Compiling file /home/yantar92/Git/org-contrib/lisp/org-static-mathjax.el at Fri 
Feb  9 12:26:04 2024

In org-static-mathjax-hook-installer:
org-static-mathjax.el:100:50: Warning: reference to free variable ‘opt-plist’
org-static-mathjax.el:107:40: Warning: reference to free variable
    ‘org-export-html-mathjax-options’

In org-static-mathjax-process:
org-static-mathjax.el:190:15: Warning: reference to free variable
    ‘org-export-inbuffer-options-extra’

Even attempting to load the library will err:
Debugger entered--Lisp error: (void-variable org-export-inbuffer-options-extra)

Since we observe no bug reports about org-static-mathjax, it does not
look like anyone at all is using it.

Should we obsolete the library?

Emacs  : GNU Emacs 30.0.50 (build 6, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, 
cairo version 1.18.0)
 of 2024-02-04
Package: Org mode version 9.7-pre (release_9.6.18-1153-gee395b.dirty @ 
/home/yantar92/.emacs.d/straight/build/org/)
-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
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