chore(agents): disable global skills

modules/agents/skills.nix

@@ -1,18 +1,12 @@
 {
   config,
   inputs,
-  pkgs,
   ...
 }:
-# Global agent skills, placed under the skills directory so they are active in
-# every project.
 let
   user = config.user.name;
-
-  # The skills installed globally, as derivations from the skills flake.
-  skills = with inputs.skills.packages.${pkgs.stdenv.hostPlatform.system}; [ ];
 in
 {
   home-manager.sharedModules = [ inputs.skills.homeModules.default ];
-  home-manager.users.${user}.programs.agents.skills = skills;
+  home-manager.users.${user}.programs.agents.skills = [ ];
 }