Remove all harmony runtime flags which shipped in M51

test/mjsunit/harmony/promise-species.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.
-
-// Flags: --harmony-species --allow-natives-syntax
-
-// Test that Promises use @@species appropriately
-
-// Another constructor with no species will not be instantiated
-var test = new Promise(function(){});
-var bogoCount = 0;
-function bogusConstructor() { bogoCount++; }
-test.constructor = bogusConstructor;
-assertTrue(Promise.resolve(test) instanceof Promise);
-assertFalse(Promise.resolve(test) instanceof bogusConstructor);
-// Tests that chromium:575314 is fixed thoroughly
-Promise.resolve(test).catch(e => %AbortJS("Error " + e)).then(() => {
-  if (bogoCount != 0) %AbortJS("bogoCount was " + bogoCount + " should be 0");
-});
-
-// If there is a species, it will be instantiated
-// @@species will be read exactly once, and the constructor is called with a
-// function
-var count = 0;
-var params;
-class MyPromise extends Promise {
-  constructor(...args) {
-    super(...args);
-    params = args;
-  }
-  static get [Symbol.species]() {
-    count++
-    return this;
-  }
-}
-
-var myPromise = MyPromise.resolve().then();
-assertEquals(1, count);
-assertEquals(1, params.length);
-assertEquals('function', typeof(params[0]));
-assertTrue(myPromise instanceof MyPromise);
-assertTrue(myPromise instanceof Promise);