diff --git a/src/challenges/unlock_manager.cpp b/src/challenges/unlock_manager.cpp
index d602d937d..ae0e208e8 100644
--- a/src/challenges/unlock_manager.cpp
+++ b/src/challenges/unlock_manager.cpp
@@ -89,15 +89,6 @@ UnlockManager::~UnlockManager()
         delete i->second;
     }
 
-
-    std::map<unsigned int, GameSlot*>::iterator it;
-    for (it = m_game_slots.begin(); it != m_game_slots.end(); it++)
-    {
-        delete it->second;
-    }
-
-    // sfx_manager is destroyed before UnlockManager is, so SFX will be already deleted
-    // sfx_manager->deleteSFX(m_locked_sound);
 }   // ~UnlockManager
 
 //-----------------------------------------------------------------------------
diff --git a/src/challenges/unlock_manager.hpp b/src/challenges/unlock_manager.hpp
index dd4c54987..70a5fd1f6 100644
--- a/src/challenges/unlock_manager.hpp
+++ b/src/challenges/unlock_manager.hpp
@@ -46,8 +46,6 @@ private:
     typedef std::map<std::string, ChallengeData*> AllChallengesType;
     AllChallengesType             m_all_challenges;
 
-    std::map<unsigned int , GameSlot*> m_game_slots;
-
     void readAllChallengesInDirs(const std::vector<std::string>* all_dirs);
 
     friend class GameSlot;