Although already stated by Gravedigger, the default goal objects are respawned automatically. Has anyone made a Foundry Canvas with all of the default goal objects moved into one area for easy deleting? I'd make it myself but my HaloBox (360) is currently getting repaired.
My ideal Foundry Canvas would have all the goals collected in one of the side rooms or on one of the loading docks. I always forget about them until I have stuff placed everywhere. It would also have the window panes for those two side rooms still in place. They don't cost anything from the budget, they are easily deleted, and have you ever tried to put them back in? It's impossible!
EDIT: I borrowed my bro's box and did it.
Get it here.