Cleanup GN BUILD files, gni's and imports.

mojo/runner/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("//build/config/ui.gni")
 import("//mojo/generate_mojo_shell_assets_list.gni")
-import("//third_party/mojo/src/mojo/public/mojo.gni")
-import("//third_party/mojo/src/mojo/public/mojo_application.gni")
+import("//mojo/public/mojo_application.gni")
+import("//testing/test.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
-import("//testing/test.gni")
 
 # We don't support building in the component build since mojo apps are
 # inherently components.
 assert(!is_component_build)
 
 group("runner") {
   testonly = true
 
   deps = [
     ":mojo_runner",
@@ skipping 418 matching lines @@
   ]
 
   deps = [
     "//base",
     "//mojo/application/public/cpp:test_support",
     "//mojo/runner/test:bindings",
     "//mojo/services/network/public/interfaces",
     "//third_party/mojo/src/mojo/public/cpp/bindings:callback",
   ]
 }