Revert of [test] Add performance test for closures.

test/js-perf-test/Closures/closures.js

-// Copyright 2015 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.
-
-new BenchmarkSuite('Closures', [1000], [
-  new Benchmark('ShortLivingClosures', false, false, 0,
-    ShortLivingClosures, ShortLivingClosuresSetup, ShortLivingClosuresTearDown)
-]);
-
-// ----------------------------------------------------------------------------
-
-
-// The pattern is this example is very common in Node.js.
-var fs = {
-  readFile: function(filename, cb) {
-    cb(null, {length: 12});
-  }
-};
-
-
-function printLength (filename) {
-  fs.readFile(filename, foo);
-
-  function foo (err, buf)  {
-    if (err) return;
-    for (var j = 0; j<1000; j++) {
-      // Do some work to make the optimization actually worth while
-      buf.length++;
-    }
-    return (buf.length);
-  }
-}
-
-
-function ShortLivingClosuresSetup() {}
-
-function ShortLivingClosures() {
-  result = printLength('foo_bar.js');
-}
-
-function ShortLivingClosuresTearDown() {
-  return result == 1012;
-}