diff --git a/compiler/rustc_trait_selection/src/traits/fulfill.rs b/compiler/rustc_trait_selection/src/traits/fulfill.rs
index 96de1fb5a61a4..2907f3ed98b74 100644
--- a/compiler/rustc_trait_selection/src/traits/fulfill.rs
+++ b/compiler/rustc_trait_selection/src/traits/fulfill.rs
@@ -425,7 +425,6 @@ impl<'a, 'b, 'tcx> FulfillProcessor<'a, 'b, 'tcx> {
                     )
                 }
 
-                // TODO
                 ty::PredicateKind::RegionOutlives(data) => {
                     match infcx.region_outlives_predicate(&obligation.cause, Binder::dummy(data)) {
                         Ok(()) => ProcessResult::Changed(vec![]),