Remove invalid test that offset time zone are unsupported

Fixes #4339

test/intl402/Temporal/ZonedDateTime/prototype/toLocaleString/offset-time-zone-not-supported.js

@@ -1,11 +0,0 @@
-// Copyright (C) 2023 Igalia, S.L. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-temporal.zoneddatetime.prototype.tolocalestring
-description: Offset time zones are not supported yet by Intl
-features: [Temporal]
----*/
-
-const datetime = new Temporal.ZonedDateTime(0n, "+00:00");
-assert.throws(RangeError, () => datetime.toLocaleString(), "Intl.DateTimeFormat does not yet specify what to do with offset time zones");