remove dev machine to flake

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "sanic - chaos music control";
   inputs = {
-    nixpkgs.url = github:NixOS/nixpkgs/nixos-24.05;
+    nixpkgs.url = github:NixOS/nixpkgs/nixpkgs-unstable;
     flake-utils.url = github:numtide/flake-utils;
     gomod2nix = {
       url = github:tweag/gomod2nix;
@@ -36,18 +36,6 @@
           mpc-cli
         ];
       };
-      nixosConfigurations."sanic" = nixpkgs.lib.nixosSystem {
-        inherit system;
-        modules = [
-          {
-            environment.systemPackages = with pkgs; [
-              sanic
-            ];
-          }
-          "${nixpkgs}/nixos/modules/virtualisation/proxmox-lxc.nix"
-          ./configuration.nix
-        ];
-      };
     }
   );
 }