remove unused custom-image-configuration file

custom-image-configuration.nix

@@ -1,20 +0,0 @@
-{ config, lib, pkgs, ... }:
-{
-  imports = [
-    ./common
-  ];
-
-  config = {
-    system.stateVersion = "22.11";
-
-    nix.nixPath = [
-      "nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos"
-      "nixos-config=/etc/nixos/configuration.nix"
-      "hardware-config=/etc/nixos/hardware-configuration.nix"
-      "/nix/var/nix/profiles/per-user/root/channels"
-    ];
-
-  } 
-  # also pull in all of the qemu-vm profile which will be the basis of the live config
-  // (builtins.removeAttrs (import ./profiles/qemu-vm {inherit lib;}) [ "deployment" ]);
-}