Simplify the thunk targets since we don't support apps as components

mojo/services/network/BUILD.gn

 # Copyright 2014 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/mojo_application.gni")
 
 mojo_native_application("network") {
   output_name = "network_service"
   sources = [ "main.cc" ]
   deps = [
     ":lib",
     "//base",
     "//mojo/application",
-    "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/bindings:bindings",
     "//mojo/services/public/cpp/network",
     "//mojo/services/public/interfaces/network",
   ]
 }
 
 source_set("lib") {
   sources = [
     "cookie_store_impl.cc",
     "cookie_store_impl.h",
@@ skipping 38 matching lines @@
 
   sources = [
     "udp_socket_apptest.cc",
   ]
 
   deps = [
     ":network",
     "//base",
     "//mojo/application",
     "//mojo/application:test_support",
-    "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/bindings:callback",
     "//mojo/services/public/cpp/network",
     "//mojo/services/public/interfaces/network",
     "//net",
     "//testing/gtest",
   ]
 }