[PRQ#42721] Deletion Request for libbrotli

MarsSeed [1] filed a deletion request for libbrotli [2]: Discontinued since 2021. [a] Not needed, as now upstream brotli project provides libbrotli* components and those are available in repo brotli package. Quote from readme: " DEPRECATED This library and effort made sense in the early days when no brotli library was provided by the brotli project. Once the brotli project started providing libraries by itself, this project turned deprecated. Switch to the "real" brotli project's library instead! " Safe to delete: nothing depends on this package. [a]: https://github.com/bagder/libbrotli [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/libbrotli/