Why does the documentation action install LaTeX?

I don't think we have any LaTeX documents in our documentation. Is it used for formula rendering by Sphinx? It's a significant install against our C.I. minutes so if we don't need it, we should remove it.

Start by locating the documentation action and its LaTeX installation configuration, then check whether Sphinx or the documentation build uses LaTeX for formula rendering. Run the documentation CI/build to confirm the dependency is unnecessary; done means removing it if unused while keeping the documentation build passing.

Written by the indexing model from the issue text.