Comment 1 for bug 2021594

I've removed the ppc64el and s390x binaries, since the build-dependencies are not satisfiable on these archs and the architecture removal has propagated to Debian testing.

riscv64 is a different matter, the build-dependencies are satisfiable there but the package failed to build; and riscv64 is not a Debian architecture so we can't follow their lead. Is there another reason we should remove the riscv64 binary instead of fixing the build failure?