Remove the --ignition-generators flag.

test/mjsunit/es6/generators-iteration.js

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-// Flags: --expose-gc --ignition-generators
+// Flags: --expose-gc
 
 // Test generator iteration.
 
 var GeneratorFunction = (function*(){yield 1;}).__proto__.constructor;
 
 function assertIteratorResult(value, done, result) {
   assertEquals({ value: value, done: done}, result);
 }
 
 function assertIteratorIsClosed(iter) {
@@ skipping 626 matching lines @@
 function* g(junk) { return yield* junk }
 var non_iterables = [
   42,
   {[Symbol.iterator]: 42},
   {[Symbol.iterator]: () => 42},
   {[Symbol.iterator]: () => ({next: 42})},
 ];
 for (let junk of non_iterables) {
   assertThrows(() => g(junk).next(), TypeError);
 }