arc-theme: remove

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

pkgs/by-name/ar/arc-theme/package.nix

@@ -1,74 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  sassc,
-  meson,
-  ninja,
-  glib,
-  gnome-shell,
-  gnome-themes-extra,
-  gtk-engine-murrine,
-  inkscape,
-  cinnamon,
-  makeFontsConf,
-  python3,
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "arc-theme";
-  version = "20221218";
-
-  src = fetchFromGitHub {
-    owner = "jnsh";
-    repo = "arc-theme";
-    tag = finalAttrs.version;
-    hash = "sha256-7VmqsUCeG5GwmrVdt9BJj0eZ/1v+no/05KwGFb7E9ns=";
-  };
-
-  nativeBuildInputs = [
-    meson
-    ninja
-    sassc
-    inkscape
-    glib # for glib-compile-resources
-    python3
-  ];
-
-  propagatedUserEnvPkgs = [
-    gnome-themes-extra
-    gtk-engine-murrine
-  ];
-
-  postPatch = ''
-    patchShebangs meson/install-file.py
-  '';
-
-  preBuild = ''
-    # Shut up inkscape's warnings about creating profile directory
-    export HOME="$TMPDIR"
-  '';
-
-  # Fontconfig error: Cannot load default config file: No such file: (null)
-  env.FONTCONFIG_FILE = makeFontsConf { fontDirectories = [ ]; };
-
-  mesonFlags = [
-    # "-Dthemes=cinnamon,gnome-shell,gtk2,gtk3,plank,xfwm,metacity"
-    # "-Dvariants=light,darker,dark,lighter"
-    "-Dcinnamon_version=${cinnamon.version}"
-    "-Dgnome_shell_version=${gnome-shell.version}"
-    # You will need to patch gdm to make use of this.
-    "-Dgnome_shell_gresource=true"
-  ];
-
-  meta = {
-    description = "Flat theme with transparent elements for GTK 3, GTK 2 and Gnome Shell";
-    homepage = "https://github.com/jnsh/arc-theme";
-    license = lib.licenses.gpl3Only;
-    platforms = lib.platforms.linux;
-    maintainers = with lib.maintainers; [
-      simonvandel
-      romildo
-    ];
-  };
-})

pkgs/top-level/aliases.nix

@@ -331,6 +331,7 @@ mapAliases {
   appthreat-depscan = throw "'appthreat-depscan' has been renamed to/replaced by 'dep-scan'"; # Converted to throw 2025-10-27
   arangodb = throw "arangodb has been removed, as it was unmaintained and the packaged version does not build with supported GCC versions"; # Added 2025-08-12
   arc-browser = throw "arc-browser was removed due to being unmaintained"; # Added 2025-09-03
+  arc-theme = throw "'arc-theme' 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
   archi = throw "'archi' has been removed, since its upstream maintainers do not want it packaged"; # Added 2025-11-18
   archipelago-minecraft = throw "archipelago-minecraft has been removed, as upstream no longer ships minecraft as a default APWorld."; # Added 2025-07-15
   ArchiSteamFarm = warnAlias "ArchiSteamFarm has been renamed to/replaced by 'archisteamfarm'" archisteamfarm; # Added 2026-01-31