serious-sans: drop

[CobaltCause]

The font has renamed itself to Serious Shanns, but also I don't really like these newer changes so I'm not interested in continuing to package this font.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[niklaskorz]

Please add an according note to nixos/doc/manual/release-notes/rl-2505.section.md. It's also possible to just drop yourself as maintainer and leaving it without any designated maintainers for now, waiting for someone else to pick it up, but seeing the upstream name changed, updating it would involve changing the package name, build script, repository... making it essentially a new package. So I'm impartial to removing the font package vs leaving it without a maintainer.

[CobaltCause]

but seeing the upstream name changed, updating it would involve changing the package name, build script, repository... making it essentially a new package.

Yeah...