Remove Mojo bindings environment.

testing/buildbot/chromium.linux.json

Index: testing/buildbot/chromium.linux.json
diff --git a/testing/buildbot/chromium.linux.json b/testing/buildbot/chromium.linux.json
index e94063f644262a8c69d42735a7990975040e37c2..80a577ff4071e21a6bc968b994cecd5aa2a28242 100644
--- a/testing/buildbot/chromium.linux.json
+++ b/testing/buildbot/chromium.linux.json
@@ -71,12 +71,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {
@@ -821,12 +815,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {
@@ -1238,12 +1226,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {
@@ -1621,12 +1603,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mojo_public_environment_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "mojo_public_system_unittests"
       },
       {