Remove perf tests that are moved to another location.

test/perf-test/Collections/weakset.js

-// Copyright 2014 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.
-
-
-var SetBenchmark = new BenchmarkSuite('WeakSet', [1000], [
-  new Benchmark('Add', false, false, 0, WeakSetAdd),
-  new Benchmark('Has', false, false, 0, WeakSetHas, WeakSetSetup,
-      WeakSetTearDown),
-  new Benchmark('Delete', false, false, 0, WeakSetDelete, WeakSetSetup,
-      WeakSetTearDown),
-]);
-
-
-var ws;
-var N = 10;
-var keys = [];
-
-
-for (var i = 0; i < N * 2; i++) {
-  keys[i] = {};
-}
-
-
-function WeakSetSetup() {
-  ws = new WeakSet;
-  for (var i = 0; i < N; i++) {
-    ws.add(keys[i]);
-  }
-}
-
-
-function WeakSetTearDown() {
-  ws = null;
-}
-
-
-function WeakSetAdd() {
-  WeakSetSetup();
-  WeakSetTearDown();
-}
-
-
-function WeakSetHas() {
-  for (var i = 0; i < N; i++) {
-    if (!ws.has(keys[i])) {
-      throw new Error();
-    }
-  }
-  for (var i = N; i < 2 * N; i++) {
-    if (ws.has(keys[i])) {
-      throw new Error();
-    }
-  }
-}
-
-
-function WeakSetDelete() {
-  // This is run more than once per setup so we will end up deleting items
-  // more than once. Therefore, we do not the return value of delete.
-  for (var i = 0; i < N; i++) {
-    ws.delete(keys[i]);
-  }
-}