Revert of Worker: Import "imported/wpt/workers" tests

third_party/WebKit/LayoutTests/imported/wpt/workers/constructors/Worker/DedicatedWorkerGlobalScope-members.worker.js

-importScripts("/resources/testharness.js");
-
-var expected = [
-  'postMessage', 'onmessage', /* DedicatedWorkerGlobalScope */
-  'self', 'location', 'close', 'onerror', 'onoffline', 'ononline', /* WorkerGlobalScope */
-  'addEventListener', 'removeEventListener', 'dispatchEvent', /* EventListener */
-  'importScripts', 'navigator', /* WorkerUtils */
-  'setTimeout', 'clearTimeout', 'setInterval', 'clearInterval', /* WindowTimers */
-  'btoa', 'atob' /* WindowBase64 */
-];
-for (var i = 0; i < expected.length; ++i) {
-  var property = expected[i];
-  test(function() {
-    assert_true(property in self);
-  }, "existence of " + property);
-}
-
-done();