remove old common, using new sub flakes and modules

hosts/lio/configuration.nix

@@ -4,6 +4,8 @@
   ...
 }:
 {
+  system.stateVersion = "23.11";
+
   hardware.enableAllFirmware = true;
 
   # Connectivity

hosts/lio/flake.nix

@@ -28,16 +28,19 @@
     }@inputs:
     let
       configuration_name = "lio";
+      system = "x86_64-linux";
+      primaryUser = "josh";
       lib = nixpkgs.lib;
     in
     {
       nixosConfigurations = {
         "${configuration_name}" = (
           lib.nixosSystem {
+            inherit system;
             specialArgs = {
               inherit inputs;
               upkgs = import inputs.nixpkgs-unstable {
-                system = "x86_64-linux";
+                inherit system;
                 config.allowUnfree = true;
               };
             };
@@ -114,14 +117,11 @@
                   };
 
                   # System configuration
-                  system.stateVersion = "23.11";
                   networking.hostName = configuration_name;
-                  programs.nh.flake = "/home/josh/.config/nixos-config/hosts/${config.networking.hostName}";
+                  programs.nh.flake = "/home/${primaryUser}/.config/nixos-config/hosts/${config.networking.hostName}";
                   nixpkgs.config.allowUnfree = true;
-
-                  # Users
                   users.users = {
-                    josh = {
+                    "${primaryUser}" = {
                       isNormalUser = true;
                       initialPassword = "password1";
                       extraGroups = [