[modules] Improve error messages.

test/mjsunit/modules-fail-cyclic-1.js

Index: test/mjsunit/modules-fail-cyclic-1.js
diff --git a/test/mjsunit/modules-fail-cyclic-1.js b/test/mjsunit/modules-fail-cyclic-1.js
deleted file mode 100644
index 5156a57cd9312f2ebbfcd6e6d8b38066bb36f2e0..0000000000000000000000000000000000000000
--- a/test/mjsunit/modules-fail-cyclic-1.js
+++ /dev/null
@@ -1,8 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-//
-// MODULE
-
-import {a} from "modules-fail-cyclic-1.js";
-export {a};