sombrero: Move agenix input to agenix module imports

flake.nix

@@ -54,7 +54,6 @@
         specialArgs = { inherit inputs; };
         modules = [
           ./hosts/sombrero/configuration.nix
-          inputs.agenix.nixosModules.default
           inputs.home-manager.nixosModules.home-manager
           ./hosts/sombrero/home.nix
         ];

hosts/sombrero/modules/age/default.nix

@@ -1,5 +1,8 @@
 { inputs, pkgs, ... }:
 {
+  imports = [ inputs.agenix.nixosModules.default ];
+
+  config = {
     age = {
       identityPaths = [ "/etc/ssh/sombrero" ];
     };
@@ -7,4 +10,5 @@
     environment.systemPackages = [
       inputs.agenix.packages."${pkgs.system}".default
     ];
+  };
 }