As noted in #29665 comment:86, our cython spkg uses custom patches:

• https://github.com/sagemath/sage-prod/tree/develop/build/pkgs/cython/patches

We should investigate whether they are still necessary.

Depends on #32985

Upstream: Fixed upstream, but not in a stable release.

CC: @orlitzky @kiwifb @antonio-rojas @slel

Component: packages: standard

Author: Michael Orlitzky

Issue created by migration from https://trac.sagemath.org/ticket/32832