Revert Sphinx documentation [Was: Issues with Sphinx]

[Gerald Pfeifer]

On Mon, 14 Nov 2022, Martin Liška wrote:
> The situation with the Sphinx migration went out of control. The TODO 
> list overwhelmed me and there are road-blocks that can't be easily fixed 
> with what Sphinx currently supports.

This migration was/is a huge and complex undertaking, and you have been 
patiently chipping away at obstacle after obstacle.

So while it probably is disappointing it did not go through this time,
you made a lot of progress and important contributions - and we all 
learned quite a bit more, also in terms of (not so obvious) requirements,
dependencies, and road blocks left which you summarized.


Timing was tricky for me being on the road last week and I am definitely
committed to keep helping with this transition. Maybe soon after we are in 
stage 1 again?

And would it make sense to convert at least our installation docs and
https://gcc.gnu.org/install/ for the GCC 13 release?

Gerald