[es6] Remove harmony-classes flag

src/preparser.h

 // Copyright 2012 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.
 
 #ifndef V8_PREPARSER_H
 #define V8_PREPARSER_H
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
@@ skipping 101 matching lines @@
   ALLOW_ACCESSORS(harmony_computed_property_names);
   ALLOW_ACCESSORS(harmony_rest_params);
   ALLOW_ACCESSORS(harmony_spreadcalls);
   ALLOW_ACCESSORS(harmony_destructuring);
   ALLOW_ACCESSORS(harmony_spread_arrays);
   ALLOW_ACCESSORS(harmony_new_target);
   ALLOW_ACCESSORS(strong_mode);
 #undef ALLOW_ACCESSORS
 
   bool allow_harmony_modules() const { return scanner()->HarmonyModules(); }
-  bool allow_harmony_classes() const { return scanner()->HarmonyClasses(); }
   bool allow_harmony_unicode() const { return scanner()->HarmonyUnicode(); }
 
   void set_allow_harmony_modules(bool a) { scanner()->SetHarmonyModules(a); }
-  void set_allow_harmony_classes(bool a) { scanner()->SetHarmonyClasses(a); }
   void set_allow_harmony_unicode(bool a) { scanner()->SetHarmonyUnicode(a); }
 
  protected:
   enum AllowRestrictedIdentifiers {
     kAllowRestrictedIdentifiers,
     kDontAllowRestrictedIdentifiers
   };
 
   enum Mode {
     PARSE_LAZILY,
@@ skipping 3807 matching lines @@
       *ok = false;
       return;
     }
     has_seen_constructor_ = true;
     return;
   }
 }
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H