[Alcatraz Gaming]

You cannot delete objects with Multi Theft Auto : San Andreas Map editor, since it doesn't have RemoveBuildingForPlayer coded in it. You can use other map editors, such as SA-MP map editor 0.3e, etc.. Although Multi Theft Auto if easy to map, i suggest to use SA-MP map editor 0.3e if you want to remove buildings and objects (RemoveBuildingForPlayer)