Remove the --ignition-generators flag.

test/mjsunit/harmony/generators.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: --ignition-generators --harmony-do-expressions
-// Flags: --allow-natives-syntax
+// Flags: --harmony-do-expressions --allow-natives-syntax
 
 
 function MaybeOptimizeOrDeoptimize(f) {
   let x = Math.random();  // --random-seed makes this deterministic
   if (x <= 0.33) {
     %OptimizeFunctionOnNextCall(f);
   } else if (x <= 0.66) {
     %DeoptimizeFunction(f);
   }
 }
@@ skipping 636 matching lines @@
   let iterable = {
     [Symbol.iterator]() {
       return { next() { return {} } };
     }
   };
   let foo = function*() { yield* iterable };
   g = foo();
   g.next();
   assertThrows(() => Throw(g), TypeError);
 }