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

sky/viewer/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")
 
 mojo_native_application("viewer") {
   output_name = "sky_viewer"
 
@@ skipping 27 matching lines @@
     ":bindings",
     ":sky_modules",
     "//base:i18n",
     "//gin",
     "//mojo/application",
     "//mojo/common",
     "//mojo/common:tracing_impl",
     "//mojo/converters/geometry",
     "//mojo/converters/surfaces",
     "//mojo/edk/js",
-    "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
     "//mojo/public/cpp/utility",
     "//mojo/public/interfaces/application",
     "//mojo/services/public/cpp/view_manager",
     "//mojo/services/public/interfaces/content_handler",
     "//mojo/services/public/interfaces/gpu",
     "//mojo/services/public/interfaces/input_events",
     "//mojo/services/public/interfaces/navigation",
     "//mojo/services/public/interfaces/network",
@@ skipping 19 matching lines @@
 
 copy("sky_modules") {
   sources = [
     "script/core.sky",
     "script/support.sky",
   ]
   outputs = [
     "$root_gen_dir/mojo/public/sky/{{source_file_part}}",
   ]
 }