core: do not deregister Tilers from Sprites, it’s asymmetrical.

src/dict.cpp

@@ -144,7 +144,8 @@ void Dict::RemoveSlot(Entity *entity)
         }
 
 #if !LOL_RELEASE
-    Log::Error("removing unregistered entity %p\n", entity);
+    Log::Error("removing unregistered entity %p (%s)\n",
+               entity, entity->GetName());
 #endif
 }
 

src/sprite.cpp

@@ -56,7 +56,6 @@ void Sprite::TickDraw(float seconds)
 
 Sprite::~Sprite()
 {
-    Tiler::Deregister(data->tileset);
     delete data;
 }