blackbird: remove

Depends on gtk-engine-murrine, which is being removed from nixpkgs.

pkgs/by-name/bl/blackbird/package.nix

@@ -1,34 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  autoreconfHook,
-  gtk-engine-murrine,
-}:
-
-stdenv.mkDerivation {
-  pname = "Blackbird";
-  version = "2017-12-13";
-
-  src = fetchFromGitHub {
-    repo = "Blackbird";
-    owner = "shimmerproject";
-    rev = "a1c5674c0ec38b4cc8ba41d2c0e6187987ae7eb4";
-    sha256 = "0xskcw36ci2ykra5gir5pkrawh2qkcv18p4fp2kxivssbd20d4jw";
-  };
-
-  nativeBuildInputs = [ autoreconfHook ];
-
-  propagatedUserEnvPkgs = [ gtk-engine-murrine ];
-
-  meta = {
-    description = "Dark Desktop Suite for Gtk, Xfce and Metacity";
-    homepage = "https://github.com/shimmerproject/Blackbird";
-    license = with lib.licenses; [
-      gpl2Plus
-      cc-by-nc-sa-30
-    ];
-    platforms = lib.platforms.linux;
-    maintainers = [ lib.maintainers.romildo ];
-  };
-}

pkgs/top-level/aliases.nix

@@ -416,6 +416,7 @@ mapAliases {
   bitwarden_rs-sqlite = throw "'bitwarden_rs-sqlite' has been renamed to/replaced by 'vaultwarden-sqlite'"; # Converted to throw 2025-10-27
   bitwarden_rs-vault = throw "'bitwarden_rs-vault' has been renamed to/replaced by 'vaultwarden-vault'"; # Converted to throw 2025-10-27
   bkyml = throw "''bkyml' has been removed due to a lack of upstream maintainance"; # Added 2026-06-16
+  blackbird = throw "'blackbird' has been removed because it depended on 'gtk-engine-murrine', which was removed because it was unmaintained upstream and depended on GTK 2."; # Added 2026-07-22
   blackbox = throw "'blackbox' has been removed since it has been deprecated and archived upstream. Consider using pass instead"; # Added 2026-01-16
   blas-reference = throw "blas-reference has been removed since it has been discontinued as free-standing package. It is now contained within lapack-reference."; # Added 2025-10-21
   blender-hip = throw "blender-hip has been removed in favor of setting `config.rocmSupport = true` or using `pkgsRocm.blender`"; # Added 2026-01-04