Remove unnecessary dependencies on mojo/edk/system

components/arc/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")
 import("//testing/test.gni")
 
 static_library("arc") {
   sources = [
     "arc_bridge_bootstrap.cc",
@@ skipping 178 matching lines @@
     "standalone/arc_standalone_bridge_runner.cc",
     "standalone/arc_standalone_bridge_runner.h",
   ]
 
   deps = [
     ":arc",
     ":arc_standalone_service",
     "//base",
     "//ipc:ipc",
     "//ipc/mojo:mojo",
-    "//mojo/edk/system",
   ]
 }
 
 test("arc_standalone_service_unittests") {
   sources = [
     "standalone/service_helper_unittest.cc",
   ]
 
   deps = [
     ":arc_standalone_service",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }
 
 executable("arc_standalone_bridge") {
   sources = [
     "standalone/arc_standalone_bridge_main.cc",
   ]
 
   deps = [
     ":arc_standalone",
     ":arc_standalone_service",
     "//base",
     "//ipc:ipc",
     "//ipc/mojo:mojo",
     "//mojo/edk/system",
   ]
 }