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

testing/buildbot/chromium.memory.fyi.json

 {
   "Chromium Linux Builder (valgrind)": {
     "additional_compile_targets": [
       "base_unittests",
       "components_unittests",
       "content_unittests",
       "crypto_unittests",
       "device_unittests",
       "display_unittests",
       "extensions_unittests",
@@ skipping 259 matching lines @@
       "installer_util_unittests",
       "ipc_tests",
       "jingle_unittests",
       "libaddressinput_unittests",
       "libphonenumber_unittests",
       "keyboard_unittests",
       "media_unittests",
       "midi_unittests",
       "mojo_system_unittests",
       "mojo_public_system_unittests",
-      "mojo_public_utility_unittests",
       "mojo_public_bindings_unittests",
       "mojo_common_unittests",
       "net_unittests",
       "printing_unittests",
       "remoting_unittests",
       "sql_unittests",
       "unit_tests",
       "url_unittests"
     ]
   },
@@ skipping 17 matching lines @@
       "net_unittests",
       "components_unittests",
       "device_unittests",
       "jingle_unittests",
       "gcm_unit_tests",
       "gpu_unittests",
       "content_unittests",
       "cacheinvalidation_unittests",
       "mojo_system_unittests",
       "mojo_public_system_unittests",
-      "mojo_public_utility_unittests",
       "mojo_public_bindings_unittests",
       "mojo_common_unittests",
       "cast_unittests",
       "cc_unittests",
       "chrome_elf_unittests",
       "chromedriver_unittests",
       "compositor_unittests",
       "courgette_unittests",
       "display_unittests",
       "extensions_unittests",
@@ skipping 201 matching lines @@
         },
         "test": "mojo_public_bindings_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "nacl_loader_unittests"
       },
       {
         "swarming": {
@@ skipping 270 matching lines @@
         },
         "test": "mojo_public_bindings_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "mojo_public_system_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "nacl_loader_unittests"
       },
       {
         "swarming": {
@@ skipping 1245 matching lines @@
       {
         "test": "mojo_common_unittests"
       },
       {
         "test": "mojo_public_bindings_unittests"
       },
       {
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
         "shard_index": 0,
         "test": "net_unittests",
         "total_shards": 2
       },
       {
         "shard_index": 1,
         "test": "net_unittests",
@@ skipping 271 matching lines @@
       {
         "test": "mojo_common_unittests"
       },
       {
         "test": "mojo_public_bindings_unittests"
       },
       {
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
         "test": "net_unittests"
       },
       {
         "test": "printing_unittests"
       },
       {
         "test": "remoting_unittests"
@@ skipping 110 matching lines @@
       {
         "test": "mojo_common_unittests"
       },
       {
         "test": "mojo_public_bindings_unittests"
       },
       {
         "test": "mojo_public_system_unittests"
       },
       {
-        "test": "mojo_public_utility_unittests"
-      },
-      {
         "test": "mojo_system_unittests"
       },
       {
         "test": "net_unittests"
       },
       {
         "test": "printing_unittests"
       },
       {
         "test": "remoting_unittests"
       },
       {
         "test": "sql_unittests"
       },
       {
         "test": "unit_tests"
       },
       {
         "test": "url_unittests"
       }
     ]
   }
 }