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

mojo/public/cpp/utility/tests/BUILD.gn

Index: mojo/public/cpp/utility/tests/BUILD.gn
diff --git a/mojo/public/cpp/utility/tests/BUILD.gn b/mojo/public/cpp/utility/tests/BUILD.gn
deleted file mode 100644
index b5a92196f55fef28487d0cfbc3e8fbbb96d29181..0000000000000000000000000000000000000000
--- a/mojo/public/cpp/utility/tests/BUILD.gn
+++ /dev/null
@@ -1,26 +0,0 @@
-# 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("tests") {
-  testonly = true
-
-  sources = [
-    "run_loop_unittest.cc",
-  ]
-
-  deps = [
-    "//mojo/public/cpp/system",
-    "//mojo/public/cpp/test_support:test_utils",
-    "//mojo/public/cpp/utility",
-    "//testing/gtest",
-  ]
-
-  # crbug.com/342893
-  if (!is_win) {
-    sources += [
-      "mutex_unittest.cc",
-      "thread_unittest.cc",
-    ]
-  }
-}