Delete the tracing service

ash/mus/window_manager_application.cc

Index: ash/mus/window_manager_application.cc
diff --git a/ash/mus/window_manager_application.cc b/ash/mus/window_manager_application.cc
index 416fe37a6bcc84297887061262627c079ff99314..34a334c50dd0daf16f10b5dbbdcb6d8e71c23faa 100644
--- a/ash/mus/window_manager_application.cc
+++ b/ash/mus/window_manager_application.cc
@@ -25,7 +25,6 @@
 #include "device/bluetooth/dbus/bluez_dbus_manager.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/cpp/service_context.h"
-#include "services/tracing/public/cpp/provider.h"
 #include "services/ui/common/accelerator_util.h"
 #include "ui/aura/env.h"
 #include "ui/aura/mus/window_tree_client.h"
@@ -137,8 +136,6 @@ void WindowManagerApplication::OnStart() {
   window_manager_ = base::MakeUnique<WindowManager>(
       context()->connector(), ash_config_, show_primary_host_on_connect_);
 
-  tracing_.Initialize(context()->connector(), context()->identity().name());
-
   std::unique_ptr<aura::WindowTreeClient> window_tree_client =
       base::MakeUnique<aura::WindowTreeClient>(
           context()->connector(), window_manager_.get(), window_manager_.get());