chore(dart2js): remove helpless warnings

vicb · vicb · commit e89fe0a9ff22 · 2015-06-12T17:47:53.000+02:00
diff --git a/modules/examples/pubspec.yaml b/modules/examples/pubspec.yaml
@@ -29,3 +29,4 @@ transformers:
     - --show-package-warnings
     - --trust-type-annotations
     - --trust-primitives
+    - --enable-experimental-mirrors
