Khanda: remove linux-firmware downgrade

flake.nix

@@ -99,8 +99,6 @@
         Khanda = nixpkgs.lib.nixosSystem {
           system = "x86_64-linux";
           modules = defaultModules ++ [
-            # FIXME: Downgrade linux-firmware to fix regression with iwlwifi
-            (import ./overlays/linux-firmware_20240610.nix)
             nixos-hardware.nixosModules.microsoft-surface-pro-9
             ./hosts/Khanda
           ];

overlays/linux-firmware_20240610.nix

@@ -1,52 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}:
-
-{
-  nixpkgs.overlays = [
-    (self: super: {
-      linux-firmware = super.callPackage (
-        {
-          stdenvNoCC,
-          fetchzip,
-          lib,
-          rdfind,
-          which,
-        }:
-
-        stdenvNoCC.mkDerivation rec {
-          pname = "linux-firmware";
-          version = "20240610";
-
-          src = fetchzip {
-            url = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/snapshot/linux-firmware-${version}.tar.gz";
-            hash = "sha256-tjDqviOMvrBoEG8+Yn+XqdBlIDfQUX0KK2kpW6/jed8=";
-          };
-
-          nativeBuildInputs = [
-            rdfind
-            which
-          ];
-
-          installFlags = [ "DESTDIR=$(out)" ];
-
-          # Firmware blobs do not need fixing and should not be modified
-          dontFixup = true;
-
-          meta = with lib; {
-            description = "Binary firmware collection packaged by kernel.org";
-            homepage = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git";
-            license = licenses.unfreeRedistributableFirmware;
-            platforms = platforms.linux;
-            maintainers = with maintainers; [ fpletz ];
-            priority = 6; # give precedence to kernel firmware
-          };
-          passthru.updateScript = ./update.sh;
-        }
-      ) { };
-    })
-  ];
-}