flake/programs: cleanup imports prefix_order

modules/flake/programs/default.nix

···
 {
   imports = [
-    # keep-sorted start prefix_order=../../,./
+    # keep-sorted start
     ./formatter.nix # formatter for nix fmt, via treefmt is a formatter for every language
     ./shell.nix # a dev shell that provieds all that you will need to work
     # keep-sorted end