Deletes remaining traces of gyp in services/ and mojo/

mojo/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")
 
 group("mojo") {
   # Meta-target, don't link into production code.
   testonly = true
   deps = [
     ":tests",
     "//mojo/common",
   ]
 
   if (!(is_linux && current_cpu == "x86")) {
-    # TODO(GYP): Figure out if this needs to be supported. Right now
-    # it won't work on x86 official builds because it needs stuff in the
-    # sysroot that doesn't exist.
     deps += [ "//mojo/public" ]
   }
 
   if (is_android) {
     deps += [ "//mojo/android" ]
   }
 
   deps += [ "//services/shell:all" ]
 }
 
 group("tests") {
   testonly = true
   deps = [
     "//ipc:ipc_tests",
     "//mojo/common:mojo_common_unittests",
     "//mojo/edk/js/test:js_integration_tests",
     "//mojo/edk/js/test:js_unittests",
     "//mojo/edk/system:mojo_message_pipe_perftests",
     "//mojo/edk/system:mojo_system_unittests",
     "//mojo/edk/test:mojo_public_bindings_perftests",
     "//mojo/edk/test:mojo_public_bindings_unittests",
     "//mojo/edk/test:mojo_public_system_perftests",
     "//mojo/edk/test:mojo_public_system_unittests",
     "//services/shell/public/cpp/tests:mojo_public_application_unittests",
     "//services/shell/runner/host:mojo_runner_host_unittests",
     "//services/shell/tests",
   ]
 }