Mojo C++ bindings: remove the utility/ folder.

testing/buildbot/gn_isolate_map.pyl

 ## 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.
 
 # gn_isolate_map.pyl - A mapping of Ninja build target names to GN labels and
 # test type classifications for the tests that are run on the bots.
 #
 # This mapping is used by MB so that we can uniformly refer to test binaries
 # by their Ninja target names in the recipes and not need to worry about how
 # they are referred to in GN or GYP specifically (the GYP target name is pretty
@@ skipping 338 matching lines @@
     "type": "unknown",
   },
   "mojo_public_bindings_unittests": {
     "label": "//mojo/edk/test:mojo_public_bindings_unittests",
     "type": "console_test_launcher",
   },
   "mojo_public_system_unittests": {
     "label": "//mojo/edk/test:mojo_public_system_unittests",
     "type": "console_test_launcher",
   },
-  "mojo_public_utility_unittests": {
-    "label": "//mojo/edk/test:mojo_public_utility_unittests",
-    "type": "console_test_launcher",
-  },
   "mojo_runner_host_unittests": {
     "label": "//mojo/runner/host:unittests",
     "type": "unknown",
   },
   "mojo_shell_unittests": {
     "label": "//mojo/shell:mojo_shell_unittests",
     "type": "unknown",
   },
   "mojo_surfaces_lib_unittests": {
     "label": "//mojo/converters/surfaces/tests:mojo_surfaces_lib_unittests",
@@ skipping 171 matching lines @@
   },
   "wm_unittests": {
     "label": "//ui/wm:wm_unittests",
     "type": "windowed_test_launcher",
   },
   "wtf_unittests": {
     "label": "//third_party/WebKit/Source/wtf:wtf_unittests",
     "type": "console_test_launcher",
   },
 }