Remove now-unused function mapclass::fillcontent()

Previously, it was used to parse 30 strings whenever loading a room. But
now it's no longer used since we just assign the tilemap to the vector
directly.

desktop_version/src/Map.h

@@ -62,8 +62,6 @@ public:
 
     void settile(int xp, int yp, int t);
 
-    void fillcontent(std::vector<std::string>& tmap);
-
 
     int area(int _rx, int _ry);