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

examples/indirect_service/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")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 group("indirect_service") {
   deps = [
     ":indirect_service_demo",
     ":indirect_integer_service",
     ":integer_service",
   ]
 }
 
 mojo_native_application("indirect_service_demo") {
   output_name = "indirect_service_demo"
 
   sources = [ "indirect_service_demo.cc" ]
 
   deps = [
     ":bindings",
     "//base",
     "//mojo/application",
     "//mojo/common",
     "//mojo/environment:chromium",
-    "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/utility",
   ]
 }
 
 mojo_native_application("integer_service") {
   output_name = "integer_service"
 
   sources = [ "integer_service.cc" ]
 
   deps = [
     ":bindings",
-    "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/application:standalone",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/utility",
   ]
 }
 
 mojo_native_application("indirect_integer_service") {
   output_name = "indirect_integer_service"
 
   sources = [ "indirect_integer_service.cc" ]
 
   deps = [
     ":bindings",
-    "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/application:standalone",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/utility",
   ]
 }
 
 mojom("bindings") {
   sources = [ "indirect_service_demo.mojom" ]
 }