It's possible that the company is locked in to a rental contract that does not allow them to break it. Since Aldi store are much smaller the total rental amount would not cover the landlord letting Albertson's out of the existing contract.
That said, landlords often try to not allow “going dark” and paying rent. Usually, grocery is an anchor, and the rents at the smaller stores are higher per square foot. Those will close if the anchor closes and stops advertising the location. Not to mention crime increases, etc.
On the other hand, grocery store sizes are weird for other uses, and there can be a small set of interested parties. And if they are all a pass, then you have an empty store. The original store left for a reason.
