Eliminate mojo::Shell client lib class

mojo/services/package_manager/package_manager.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/services/package_manager/package_manager.h"
 
 #include "base/bind.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/task_runner_util.h"
 #include "mojo/common/mojo_scheme_register.h"
@@ skipping 89 matching lines @@
 
   system_package_dir_ =
       mojo::util::FilePathToFileURL(shell_dir).Resolve(std::string());
   system_package_dir_ =
       mojo::util::AddTrailingSlashIfNeeded(system_package_dir_);
 
   DeserializeCatalog();
 }
 PackageManager::~PackageManager() {}
 
-void PackageManager::Initialize(mojo::Shell* shell, const std::string& url,
-                                uint32_t id, uint32_t user_id) {}
-
 bool PackageManager::AcceptConnection(mojo::Connection* connection) {
   connection->AddInterface<mojom::Catalog>(this);
   connection->AddInterface<mojom::Resolver>(this);
   if (connection->GetRemoteApplicationURL() == "mojo://shell/")
     connection->AddInterface<mojom::ShellResolver>(this);
   return true;
 }
 
 void PackageManager::Create(mojo::Connection* connection,
                             mojom::ResolverRequest request) {
@@ skipping 213 matching lines @@
     ApplicationInfo info;
     info.url = url;
     info.name = url.spec();
     catalog_[info.url] = info;
   }
   SerializeCatalog();
   CompleteResolveMojoURL(url, qualifier, callback);
 }
 
 }  // namespace package_manager