Remove //build/module_args/mojo.gni.

build/module_args/mojo.gni

-# Copyright 2015 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.
-
-# This variable should point to the parent directory of the Mojo SDK.
-mojo_sdk_root = "//third_party/mojo/src"
-
-# Chromium builds the network service from source, as it is the
-# producer of the network service.
-mojo_build_network_service_from_source = true
-
-# Chromium does not build dart apptests. Disable any Mojo targets which
-# depend on the apptest framework.
-mojo_disable_dart_apptest_framework = true
-
-# Points to the directory network_service is built from.
-mojo_network_service_root = "//mojo/services"
-
-# We use our own custom application and network code. Don't build Mojo's.
-mojo_disable_application_in_sdk = true
-mojo_disable_network_in_sdk = true
-
-declare_args() {
-  # The mojo shell is forked and built in the chromium repo.
-  mojo_build_mojo_shell_from_source = true
-
-  # Specify prebuilt network service mojo file location rather than download
-  # from gs://mojo.
-  #
-  # This variable only used when mojo_build_network_service_from_source is
-  # false.
-  #
-  # Currently only android_arm and linux_64 available on gs://mojo, and no plan
-  # to support more(https://codereview.chromium.org/921873003).
-  # It is needed for developers works on other platforms like android_x86 and
-  # android_x64. And it is also useful for supportted platform as well when
-  # developer want to try its own version of network service files.
-  mojo_prebuilt_network_service_location = ""
-
-  # For network_service_apptests.mojo
-  mojo_prebuilt_network_service_apptests_location = ""
-}