Changed test for clarity

Author: G-Lee1031

test/language/destructuring/binding/iteratorstepvalue-throws.js

@@ -28,8 +28,8 @@ info: |
     1. If _value_ is not present, then
         a. Let _result_ be Completion(Call(_iteratorRecord_.[[NextMethod]], _iteratorRecord_.[[Iterator]])).
     6. Return _result_.
-features: [destructuring-binding, async-functions, async-iteration, Symbol.iterator]
+features: [destructuring-binding, Symbol.iterator]
 ---*/
 assert.throws(TypeError, function () {
-    var [[] = 1] = { [Symbol.iterator] : async function (x) {}};
+    var [{} = 1] = { [Symbol.iterator] : function (x) {return {};}};
 }, "IteratorStepValue throws when iteratorRecord.[[NextMethod]] is undefined.");