gradience: remove package

It is available in nixpkgs now.

pkgs/default.nix

@@ -33,7 +33,6 @@ let
           sha256 = "sha256-yPyomT+OmOe4mFJMNCq2FBgNHzuAvZ70itFA0s5BwV8=";
         };
       });
-      gradience = callPackage ./gradience { libadwaita = libadwaita-latest; };
       guile-config = callPackage ./guile-config.nix { };
       guile-hall = callPackage ./guile-hall.nix { };
       gnome-info-collect = callPackage ./gnome-info-collect { };

pkgs/gradience/default.nix

@@ -1,81 +0,0 @@
-{ stdenv
-, lib
-, fetchFromGitHub
-, wrapGAppsHook4
-, meson
-, ninja
-, pkg-config
-, glib
-, desktop-file-utils
-, gettext
-, librsvg
-, blueprint-compiler
-, python3Packages
-, appstream-glib
-, libadwaita
-, libportal
-, libportal-gtk4
-, gobject-introspection
-, python-material-color-utilities
-, sassc
-}:
-
-# Not all parts of the application works with the current nixpkgs version of
-# libadwaita.
-python3Packages.buildPythonApplication rec {
-  pname = "gradience";
-  version = "0.3.0";
-
-  src = fetchFromGitHub {
-    owner = "GradienceTeam";
-    repo = "Gradience";
-    rev = version;
-    sha256 = "sha256-mTRkuKqeHrLiohp4l8izaZhixIRei0peKQZOiXxna2Y=";
-  };
-
-  format = "other";
-  dontWrapGApps = true;
-
-  nativeBuildInputs = [
-    appstream-glib
-    blueprint-compiler
-    desktop-file-utils
-    gettext
-    glib
-    gobject-introspection
-    meson
-    ninja
-    pkg-config
-    wrapGAppsHook4
-    sassc
-  ];
-
-  buildInputs = [
-    libadwaita
-    libportal
-    libportal-gtk4
-    librsvg
-  ];
-
-  propagatedBuildInputs = with python3Packages; [
-    anyascii
-    aiohttp
-    cssutils
-    jinja2
-    pygobject3
-    svglib
-    Yapsy
-  ] ++ [
-    python-material-color-utilities
-  ];
-
-  preFixup = ''
-    makeWrapperArgs+=("''${gappsWrapperArgs[@]}")
-  '';
-
-  meta = with lib; {
-    homepage = "https://github.com/GradienceTeam/Gradience";
-    description = "Customize libadwaita and GTK3 apps (with adw-gtk3)";
-    license = licenses.mit;
-  };
-}