Remove test which duplicates 'style-default-en.js'

test/intl402/DurationFormat/prototype/format/basic-format-en.js

@@ -1,26 +0,0 @@
-// Copyright 2022 Igalia, S.L. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-Intl.DurationFormat.prototype.format
-description: Test if format method formats duration correctly
-locale: [en-US]
-features: [Intl.DurationFormat]
----*/
-
-const duration = {
-  years: 1,
-  months: 2,
-  weeks: 3,
-  days: 3,
-  hours: 4,
-  minutes: 5,
-  seconds: 6,
-  milliseconds: 7,
-  microseconds: 8,
-  nanoseconds: 9,
-};
-
-const df = new Intl.DurationFormat('en');
-
-assert.sameValue(df.format(duration), "1 yr, 2 mths, 3 wks, 3 days, 4 hr, 5 min, 6 sec, 7 ms, 8 μs, 9 ns");