Remove Mojo bindings environment.

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 7b08547c5643db784153208824bfd3174e68f46b..3cf6772b15ea1e6dbdffd283b94e4fda5952297c 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -29,7 +29,6 @@
       "media_blink_unittests",
       "mojo_common_unittests",
       "mojo_public_bindings_unittests",
-      "mojo_public_environment_unittests",
       "mojo_public_system_unittests",
       "mojo_public_utility_unittests",
       "mojo_system_unittests",
@@ -241,12 +240,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {
@@ -569,12 +562,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {
@@ -897,12 +884,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {
@@ -1226,12 +1207,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {