[PRQ#62116] Deletion Request for rust-nightly-bin

MarsSeed [1] filed a deletion request for rust-nightly-bin [2]: This broken package for upstream's nightly build of rust is not needed to be kept, as Arch/extra/rustup [a] can be installed by the user. With a simple one-line choice configuration, the latter can be directed to automatically pull upstream's latest rust nightly build. [a]: https://archlinux.org/packages/?q=rustup [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/rust-nightly-bin/