No need to set "--harmony" in renderer process.

After Chrome 37 renderer process can work correctly without it.

atom/renderer/atom_renderer_client.cc

@@ -87,10 +87,6 @@ AtomRendererClient::AtomRendererClient()
     node_integration_ = ALL;
 
   if (IsNodeBindingEnabled()) {
-    // Always enable harmony when node binding is on.
-    std::string flags("--harmony");
-    v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
-
     node_bindings_.reset(NodeBindings::Create(false));
     atom_bindings_.reset(new AtomRendererBindings);
   }