Enable use_once_callback on mojom GN rule by default

components/filesystem/public/interfaces/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//mojo/public/tools/bindings/mojom.gni")
 
 mojom("interfaces") {
   sources = [
     "directory.mojom",
     "file.mojom",
     "file_system.mojom",
     "types.mojom",
   ]
   public_deps = [
     "//mojo/common:common_custom_types",
   ]
-
-  use_once_callback = true
 }