Delete Promises Layout Tests.

LayoutTests/fast/js/Promise-init-in-workers-expected.txt

-[Worker] Test Promise.
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-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
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-Starting worker: resources/Promise-init-in-workers.js
-PASS [Worker] promise instanceof Promise is true
-PASS [Worker] promise.constructor is Promise
-PASS [Worker] thisInInit === promise is false
-PASS [Worker] thisInInit === global is true
-PASS [Worker] resolve instanceof Function is true
-PASS [Worker] reject instanceof Function is true
-PASS [Worker] new Promise() threw exception TypeError: Promise constructor takes a function argument.
-PASS [Worker] new Promise(37) threw exception TypeError: Promise constructor takes a function argument.
-PASS [Worker] promise = new Promise(function() { throw Error("foo"); }) did not throw exception.
-PASS [Worker] result.message is "foo"
-PASS [Worker] fulfilled
-PASS [Worker] result is "hello"
-PASS successfullyParsed is true
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-TEST COMPLETE
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