docs(tvix/glue/builtins): drop TODO

builtins.filterSource and builtins.path itself are very short these
days, and use the same underlying (private) helper function.

Describing builtins.filterSource with builtins.path won't lead to less
code, so this TODO can be dropped.

Change-Id: I5457949136e19204b32c8182b6c89e66cc2183e2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/13252
Reviewed-by: Domen Kožar <domen@cachix.org>
Tested-by: BuildkiteCI
Reviewed-by: Marijan Petričević <marijan.petricevic94@gmail.com>
Autosubmit: flokli <flokli@flokli.de>

tvix/glue/src/builtins/mod.rs

@@ -49,7 +49,6 @@ pub fn add_import_builtins<'co, 'ro, 'env, IO>(
     eval_builder: tvix_eval::EvaluationBuilder<'co, 'ro, 'env, IO>,
     io: Rc<TvixStoreIO>,
 ) -> tvix_eval::EvaluationBuilder<'co, 'ro, 'env, IO> {
-    // TODO(raitobezarius): evaluate expressing filterSource as Nix code using path (b/372)
     eval_builder.add_builtins(import::import_builtins(io))
 }