sombrero: Cleanup configuration.nix

hosts/sombrero/configuration.nix

@@ -1,16 +1,5 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
 { pkgs, ... }:
-
 {
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
-
-  nixpkgs.config.allowUnfree = true;
-
-  environment.variables.EDITOR = "vim";
-
   imports =
     [
       ../../config-manager/default.nix
@@ -18,6 +7,12 @@
       ./modules
     ];
 
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+
+  nixpkgs.config.allowUnfree = true;
+
+  environment.variables.EDITOR = "vim";
+
   boot = {
     loader = {
       grub.enable = false;