Remove Mojo bindings environment.

mojo/edk/system/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("//testing/test.gni")
 import("../../../mojo/public/tools/bindings/mojom.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 150 matching lines @@
   }
 
   deps = [
     ":test_utils",
     "//base",
     "//base/test:test_support",
     "//mojo/edk/embedder:embedder_unittests",
     "//mojo/edk/system",
     "//mojo/edk/test:run_all_unittests",
     "//mojo/edk/test:test_support",
-    "//mojo/public/cpp/environment:standalone",
     "//testing/gtest",
   ]
 
   allow_circular_includes_from = [ "//mojo/edk/embedder:embedder_unittests" ]
 }
 
 test("mojo_message_pipe_perftests") {
   sources = [
     "message_pipe_perftest.cc",
   ]
 
   deps = [
     ":test_utils",
     "//base",
     "//base/test:test_support",
     "//mojo/edk/system",
     "//mojo/edk/test:run_all_perftests",
     "//mojo/edk/test:test_support",
-    "//mojo/public/cpp/environment:standalone",
     "//testing/gtest",
   ]
 }