chore: remove unused nixi and nixx

modules/home-manager/packages/nixi.nix

@@ -1,18 +0,0 @@
-{pkgs, ...}: let
-  nixi = pkgs.writeShellScriptBin "nixi" ''
-    # npm-like command for nix
-    function nix-shell() {
-      local pkg="$1"
-      nix shell "nixpkgs#$pkg"
-    }
-    nix-shell $1
-  '';
-in {
-  imports = [];
-  options.nixi = {};
-  config = {
-    home.packages = [
-      nixi
-    ];
-  };
-}

modules/home-manager/packages/nixx.nix

@@ -1,18 +0,0 @@
-{pkgs, ...}: let
-  nixx = pkgs.writeShellScriptBin "nixx" ''
-    # npx-like command for nix
-    function nix-run() {
-      local pkg="$1"
-        nix run "nixpkgs#$pkg"
-    }
-    nix-run $1
-  '';
-in {
-  imports = [];
-  options.nixx = {};
-  config = {
-    home.packages = [
-      nixx
-    ];
-  };
-}