refactor(wpcarro/emacs): Remove list.el's dep on dash.el 🎉

Still pruning the dependency tree. Thank you, seq.el, from DWIMing.

Change-Id: I797f08abe44853b9d297a99d5ba9e9bde3dcfeec
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6040
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI

users/wpcarro/emacs/pkgs/list/default.nix

@@ -8,9 +8,6 @@ let
         version = "1.0.0";
         src = ./list.el;
         packageRequires =
-          (with emacsPackages; [
-            dash
-          ]) ++
           (with depot.users.wpcarro.emacs.pkgs; [
             maybe
             set