Remove Mojo bindings environment.

mojo/services/network/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.
 
 source_set("cpp") {
   public_configs = [ "../../../public/build/config:mojo_services" ]
   sources = [
     "udp_socket_wrapper.cc",
     "udp_socket_wrapper.h",
     "web_socket_read_queue.cc",
     "web_socket_read_queue.h",
     "web_socket_write_queue.cc",
     "web_socket_write_queue.h",
   ]
 
   deps = [
     "../interfaces",
     "//base",
-    "//mojo/environment:chromium",
     "//mojo/message_pump",
     "//mojo/public/c/system",
     "//mojo/public/cpp/system",
     "//mojo/shell/public/cpp",
   ]
 }