Deletes remaining traces of gyp in services/ and mojo/

services/shell/public/cpp/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.
 
-# GYP version: mojo/mojo_base.gyp:mojo_application_base
 group("cpp") {
   public_deps = [
     ":sources",
   ]
 }
 
 # TODO(rockot): Rename this to "cpp".
 static_library("sources") {
   sources = [
     "capabilities.h",
@@ skipping 71 matching lines @@
       "//base/test:test_support",
       "//mojo/public/cpp/bindings",
       "//mojo/public/cpp/system",
       "//services/shell/background:lib",
       "//services/shell/public/interfaces:interfaces_cpp_sources",
     ]
 
     data_deps = []
   }
 }