diff --git a/internal/core/adt/expr.go b/internal/core/adt/expr.go
index 9f7bb6300..8902be8db 100644
--- a/internal/core/adt/expr.go
+++ b/internal/core/adt/expr.go
@@ -45,9 +45,6 @@ type StructLit struct {
 
 	// TODO: record the merge order somewhere.
 
-	// IsOpen is kept as it's used by ListMarker and some validations
-	IsOpen bool // has a ...
-
 	// isComprehension is kept as it's used in comprehension.go and conjunct.go
 	isComprehension bool
 }