Mojo bindings: Fix typemap includes.

mojo/public/cpp/bindings/tests/struct_with_traits_impl.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/public/cpp/bindings/tests/struct_with_traits_impl.h"
 
-#include "mojo/public/interfaces/bindings/tests/struct_with_traits.mojom.h"
-
 namespace mojo {
 namespace test {
 
 StructWithTraitsImpl::StructWithTraitsImpl() {}
 
 StructWithTraitsImpl::~StructWithTraitsImpl() {}
 
 }  // namespace test
-
-// static
-bool StructTraits<test::StructWithTraits, test::StructWithTraitsImpl>::Read(
-    test::StructWithTraits_Reader r,
-    test::StructWithTraitsImpl* out) {
-  out->set_bool(r.f_bool());
-  out->set_uint32(r.f_uint32());
-  out->set_uint64(r.f_uint64());
-  out->set_string(r.f_string().as_string());
-  return true;
-}
-
 }  // namespace mojo