[nmader]

Well, that is really quite simple, what I recommend, is that you use the search bar on forum.sa-mp.com, and just search SAMP Editor and get the latest one, and it allows you to delete buildings, and it gives you a code which you should later add to your OnGameModeInit (OnFilterScriptInit if you are using it as a filterscript)

Feel free to give me some Rep if I helped!