Removes example code that isn't correctly wired up

mash/session/session.h

Index: mash/session/session.h
diff --git a/mash/session/session.h b/mash/session/session.h
index 576492b102c1668fe2e33a710e3e8665b6c6e348..a10a91e5469b8295573a08ebbfbf1dcd4da01416 100644
--- a/mash/session/session.h
+++ b/mash/session/session.h
@@ -10,7 +10,6 @@
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "mash/session/public/interfaces/session.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/public/cpp/bindings/interface_ptr_set.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
@@ -23,9 +22,7 @@ class Connection;
 namespace mash {
 namespace session {
 
-class Session : public service_manager::Service,
-                public mojom::Session,
-                public service_manager::InterfaceFactory<mojom::Session> {
+class Session : public service_manager::Service {
  public:
   Session();
   ~Session() override;
@@ -36,24 +33,9 @@ class Session : public service_manager::Service,
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override;
 
-  // mojom::Session:
-  void Logout() override;
-  void SwitchUser() override;
-  void AddScreenlockStateListener(
-      mojom::ScreenlockStateListenerPtr listener) override;
-  void LockScreen() override;
-  void UnlockScreen() override;
-
-  // service_manager::InterfaceFactory<mojom::Session>:
-  void Create(const service_manager::Identity& remote_identity,
-              mojom::SessionRequest request) override;
-
   void StartWindowManager();
   void StartQuickLaunch();
 
-  void StartScreenlock();
-  void StopScreenlock();
-
   // Starts the application at |url|, running |restart_callback| if the
   // connection to the application is closed.
   void StartRestartableService(const std::string& url,
@@ -61,9 +43,6 @@ class Session : public service_manager::Service,
 
   std::map<std::string, std::unique_ptr<service_manager::Connection>>
       connections_;
-  bool screen_locked_;
-  mojo::BindingSet<mojom::Session> bindings_;
-  mojo::InterfacePtrSet<mojom::ScreenlockStateListener> screenlock_listeners_;
 
   DISALLOW_COPY_AND_ASSIGN(Session);
 };