Don't check map.extrarow when opening map

This is just to make sure there aren't any more inconsistencies with
regards to the value of graphics.menuoffset. Can't hurt to be sure.

desktop_version/src/Game.cpp

@@ -6876,10 +6876,6 @@ void Game::mapmenuchange(const int newgamestate, const bool user_initiated)
     if (prevgamestate == GAMEMODE)
     {
         graphics.menuoffset = 240;
-        if (map.extrarow)
-        {
-            graphics.menuoffset -= 10;
-        }
     }
     else
     {