Remove the --ignition-generators flag.

test/cctest/interpreter/test-bytecode-generator.cc

 // 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.
 
 #include <fstream>
 
 #include "src/v8.h"
 
 #include "src/compiler.h"
 #include "src/interpreter/bytecode-array-iterator.h"
@@ skipping 2206 matching lines @@
       "  }\n"
       "  test = new B().constructor;\n"
       "})();\n",
   };
 
   CHECK(CompareTexts(BuildActual(printer, snippets),
                      LoadGolden("ClassAndSuperClass.golden")));
 }
 
 TEST(Generators) {
-  bool old_flag = FLAG_ignition_generators;
-  FLAG_ignition_generators = true;
-
   InitializedIgnitionHandleScope scope;
   BytecodeExpectationsPrinter printer(CcTest::isolate(),
                                       ConstantPoolType::kMixed);
   printer.set_wrap(false);
   printer.set_test_function_name("f");
 
   const char* snippets[] = {
       "function* f() { }\n"
       "f();\n",
 
       "function* f() { yield 42 }\n"
       "f();\n",
 
       "function* f() { for (let x of [42]) yield x }\n"
       "f();\n",
   };
 
   CHECK(CompareTexts(BuildActual(printer, snippets),
                      LoadGolden("Generators.golden")));
-
-  FLAG_ignition_generators = old_flag;
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8