Remove the --ignition-generators flag.

test/mjsunit/harmony/debug-async-liveedit.js

 // Copyright 2016 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-async-await
-// Flags: --expose-debug-as debug --allow-natives-syntax --ignition-generators
+// Flags: --expose-debug-as debug --allow-natives-syntax
 
 var Debug = debug.Debug;
 var LiveEdit = Debug.LiveEdit;
 
 unique_id = 0;
 
 var AsyncFunction = (async function(){}).constructor;
 
 function assertPromiseValue(value, promise) {
   promise.then(resolve => {
@@ skipping 107 matching lines @@
   promise = asyncfn(function() { return fun_inside(attempt_fun_patches) });
   assertEquals('Cat',
                fun_outside(function () {
                  assertPromiseValue('Capybara', promise);
                  assertTrue(fun_patch_restarted);
                  assertTrue(fun_inside.toString().includes("'Koala'"));
                }));
 })();
 
 %RunMicrotasks();