Remove mojo::WTFMap.

mojo/public/cpp/bindings/struct_traits.h

Index: mojo/public/cpp/bindings/struct_traits.h
diff --git a/mojo/public/cpp/bindings/struct_traits.h b/mojo/public/cpp/bindings/struct_traits.h
index a1379fe28c9b5edc80e591315102fbf0db473184..d570eac51b9c915af5660e5729c75388738e1a7b 100644
--- a/mojo/public/cpp/bindings/struct_traits.h
+++ b/mojo/public/cpp/bindings/struct_traits.h
@@ -39,7 +39,7 @@ namespace mojo {
 //        - map:
 //          Value or reference of any type that has a MapTraits defined.
 //          Supported by default: std::map, std::unordered_map, mojo::Map,
-//          WTF::HashMap (in blink), mojo::WTFMap (in blink).
+//          WTF::HashMap (in blink).
 //
 //        - struct:
 //          Value or reference of any type that has a StructTraits defined.