diff --git a/pql/ast.go b/pql/ast.go
index 65a74908f..383e37e15 100644
--- a/pql/ast.go
+++ b/pql/ast.go
@@ -475,7 +475,6 @@ var callInfoByFunc = map[string]callInfo{
 		allowUnknown: false,
 		prototypes: map[string]interface{}{
 			"columns": interfaceOrVariable,
-			// "columns": []interface{}{},
 		},
 		callType: PrecallGlobal,
 	},