gnome3: only maintain single GNOME 3 package set (#29397)

* gnome3: only maintain single GNOME 3 package set

GNOME 3 was split into 3.10 and 3.12 in #2694. Unfortunately, we barely have the resources
to update a single version of GNOME. Maintaining multiple versions just does not make sense.
Additionally, it makes viewing history using most Git tools bothersome.

This commit renames `pkgs/desktops/gnome-3/3.24` to `pkgs/desktops/gnome-3`, removes
the config variable for choosing packageset (`environment.gnome3.packageSet`), updates
the hint in maintainer script, and removes the `gnome3_24` derivation from `all-packages.nix`.

Closes: #29329

* maintainers/scripts/gnome: Use fixed GNOME 3 directory

Since we now allow only a single GNOME 3 package set, specifying
the working directory is not necessary.

This commit sets the directory to `pkgs/desktops/gnome-3`.

1 files changed, 12 insertions, 0 deletions

diff --git a/pkgs/desktops/gnome-3/core/gnome-backgrounds/default.nix b/pkgs/desktops/gnome-3/core/gnome-backgrounds/default.nix
new file mode 100644
index 0000000000000..eb801caf5657d
--- /dev/null
+++ b/pkgs/desktops/gnome-3/core/gnome-backgrounds/default.nix
@@ -0,0 +1,12 @@
+{ stdenv, fetchurl, pkgconfig, gnome3, intltool }:
+
+stdenv.mkDerivation rec {
+  inherit (import ./src.nix fetchurl) name src;
+
+  nativeBuildInputs = [ pkgconfig intltool ];
+
+  meta = with stdenv.lib; {
+    platforms = platforms.unix;
+    maintainers = gnome3.maintainers;
+  };
+}