Delete the tracing service

components/filesystem/file_system_app.h

Index: components/filesystem/file_system_app.h
diff --git a/components/filesystem/file_system_app.h b/components/filesystem/file_system_app.h
index 7035393eda1071b1cc604195298ce863fdf92364..e32cf058644aebd50bfb5f4fdc62f437b831e368 100644
--- a/components/filesystem/file_system_app.h
+++ b/components/filesystem/file_system_app.h
@@ -13,7 +13,6 @@
 #include "services/service_manager/public/cpp/binder_registry.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
-#include "services/tracing/public/cpp/provider.h"
 
 namespace filesystem {
 
@@ -38,8 +37,6 @@ class FileSystemApp
   void Create(const service_manager::Identity& remote_identity,
               mojo::InterfaceRequest<mojom::FileSystem> request) override;
 
-  tracing::Provider tracing_;
-
   service_manager::BinderRegistry registry_;
 
   scoped_refptr<LockTable> lock_table_;