Remove nixos-images/disko override...

because nixos-images doesn't have a dependency on disko anymore.

Author: phaer

flake.nix

@@ -10,7 +10,6 @@
     nixos-images.url = "github:nix-community/nixos-images";
     nixos-images.inputs.nixos-unstable.follows = "nixpkgs";
     nixos-images.inputs.nixos-2305.follows = "nixos-2305";
-    nixos-images.inputs.disko.follows = "disko";
     # used for development
     treefmt-nix = { url = "github:numtide/treefmt-nix"; inputs.nixpkgs.follows = "nixpkgs"; };
   };