Remove nushell configuration

nix/modules/nushell/default.nix

@@ -1,14 +0,0 @@
-{ config, lib, pkgs, ... }:
-{
-  programs.zoxide.enableNushellIntegration = true;
-  programs.direnv.enableNushellIntegration = true;
-
-  programs.nushell = {
-    enable = true;
-
-    shellAliases = {
-      ec = "emacsclient -n --alternate-editor=emacs";
-      pubip = "curl icanhazip.com";
-    };
-  };
-}