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

testing/buildbot/chromium.fyi.json

Index: testing/buildbot/chromium.fyi.json
diff --git a/testing/buildbot/chromium.fyi.json b/testing/buildbot/chromium.fyi.json
index 7ddda708aee1fa316859b4e0e41727bd1472f0e1..2063754133d6060f53fd43925b919310496f976c 100644
--- a/testing/buildbot/chromium.fyi.json
+++ b/testing/buildbot/chromium.fyi.json
@@ -500,9 +500,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -696,12 +693,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -1206,12 +1197,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -1908,12 +1893,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -2203,9 +2182,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -6451,12 +6427,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -6700,12 +6670,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -6988,9 +6952,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -7228,9 +7189,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {