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

testing/buildbot/chromium.mac.json

Index: testing/buildbot/chromium.mac.json
diff --git a/testing/buildbot/chromium.mac.json b/testing/buildbot/chromium.mac.json
index 3cf6772b15ea1e6dbdffd283b94e4fda5952297c..9b29c59c930d2519cd6c7cf72dfc22308c2823a9 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -30,7 +30,6 @@
       "mojo_common_unittests",
       "mojo_public_bindings_unittests",
       "mojo_public_system_unittests",
-      "mojo_public_utility_unittests",
       "mojo_system_unittests",
       "ppapi_unittests",
       "printing_unittests",
@@ -243,12 +242,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -565,12 +558,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -887,12 +874,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -1210,12 +1191,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {