maintenance: removed deprecated code from memcells, tracks, events

Ground.h

@@ -306,13 +306,9 @@ class TGround
         ssh = 0,
         ssm = 0; // ustawienia czasu
     // int tracks,tracksfar; //liczniki torów
-#ifdef EU07_USE_OLD_TNAMES_CLASS
-    TNames *sTracks = nullptr; // posortowane nazwy torów i eventów
-#else
     typedef std::unordered_map<std::string, TEvent *> event_map;
     event_map m_eventmap;
     TNames<TGroundNode *> m_trackmap;
-#endif
     light_array m_lights; // collection of dynamic light sources present in the scene
 
   private: // metody prywatne