[Pkg-rust-maintainers] Bug#1033335: Don't include in Bookworm

[Moritz Muehlenhoff]

Source: rust-const-cstr
Version: 0.3.0-1
Severity: serious

Hi,
there is https://rustsec.org/advisories/RUSTSEC-2023-0020.html which flags
that rust-const-cstr is unmaintained. Since there are no reverse deps in the
archive, let's exclude it from bookworm (or rather remove rightaway)?

Cheers,
        Moritz