Remove fixes comment

Author: jagunter

compiler/rustc_hir_typeck/src/demand.rs

@@ -824,7 +824,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             && let ty::Ref(_, inner, hir::Mutability::Not) = expected.kind()
 
             // Cannot use found in can_eq if it contains region variables that no longer exist.
-            // Fixes #140823
             && !found.has_infer_regions()
 
             // The difference between the expected and found values is one level of borrowing.