Remove all harmony runtime flags which shipped in M51

test/mjsunit/harmony/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
-
-// Test the ES2015 @@species feature
-
-'use strict';
-
-let TypedArray = Uint8Array.__proto__;
-
-// The @@species property exists on the right objects and has the right values
-
-let classesWithSpecies = [RegExp, Array, TypedArray, ArrayBuffer, Map, Set, Promise];
-let classesWithoutSpecies = [Object, Function, String, Number, Symbol, WeakMap, WeakSet];
-
-for (let constructor of classesWithSpecies) {
-  assertEquals(constructor, constructor[Symbol.species]);
-  assertThrows(function() { constructor[Symbol.species] = undefined }, TypeError);
-  let descriptor = Object.getOwnPropertyDescriptor(constructor, Symbol.species);
-  assertTrue(descriptor.configurable);
-  assertFalse(descriptor.enumerable);
-  assertEquals(undefined, descriptor.writable);
-  assertEquals(undefined, descriptor.set);
-  assertEquals('function', typeof descriptor.get);
-}
-
-// @@species is defined with distinct getters
-assertEquals(classesWithSpecies.length,
-             new Set(classesWithSpecies.map(constructor =>
-                                            Object.getOwnPropertyDescriptor(
-                                              constructor, Symbol.species).get)
-                ).size);
-
-for (let constructor of classesWithoutSpecies)
-  assertEquals(undefined, constructor[Symbol.species]);