[es6] Remove harmony-classes flag

test/cctest/compiler/test-run-jsops.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "test/cctest/compiler/function-tester.h"
 
 using namespace v8::internal;
 using namespace v8::internal::compiler;
@@ skipping 505 matching lines @@
 
 TEST(RegExpLiteral) {
   FunctionTester T("(function(a) { o = /b/; return o.test(a); })");
 
   T.CheckTrue(T.Val("abc"));
   T.CheckFalse(T.Val("xyz"));
 }
 
 
 TEST(ClassLiteral) {
-  FLAG_harmony_classes = true;
   FLAG_harmony_sloppy = true;
   const char* src =
       "(function(a,b) {"
       "  class C {"
       "    x() { return a; }"
       "    static y() { return b; }"
       "    get z() { return 0; }"
       "    constructor() {}"
       "  }"
       "  return new C().x() + C.y();"
       "})";
   FunctionTester T(src);
 
   T.CheckCall(T.Val(65), T.Val(23), T.Val(42));
   T.CheckCall(T.Val("ab"), T.Val("a"), T.Val("b"));
 }