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

testing/buildbot/chromium.memory.fyi.json

Index: testing/buildbot/chromium.memory.fyi.json
diff --git a/testing/buildbot/chromium.memory.fyi.json b/testing/buildbot/chromium.memory.fyi.json
index ab8ad0015718ace6b3d0c7089a07b12164e767e1..74efcbae421da6f52c4cf78392353b4dc76fbdbb 100644
--- a/testing/buildbot/chromium.memory.fyi.json
+++ b/testing/buildbot/chromium.memory.fyi.json
@@ -277,7 +277,6 @@
       "midi_unittests",
       "mojo_system_unittests",
       "mojo_public_system_unittests",
-      "mojo_public_utility_unittests",
       "mojo_public_bindings_unittests",
       "mojo_common_unittests",
       "net_unittests",
@@ -315,7 +314,6 @@
       "cacheinvalidation_unittests",
       "mojo_system_unittests",
       "mojo_public_system_unittests",
-      "mojo_public_utility_unittests",
       "mojo_public_bindings_unittests",
       "mojo_common_unittests",
       "cast_unittests",
@@ -537,12 +535,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -833,12 +825,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -2104,9 +2090,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -2398,9 +2381,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
@@ -2531,9 +2511,6 @@
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {