UE5 World Partition can not delete landscape

Hi I’m new to Unreal. I created a new blank project (Games > Blank Project) but I cannot delete the landscape.

I have read that the world partition landscape in the (Games > Blank Project) cannot currently be deleted in UE5 unless you select all the pieces from the outliner and delete them.

So I expanded the landscape folder and deleted all of the pieces and then saved the project but when I closed the Project and Reopened the project the landscape pieces (all the mountains) were still there like in the image below. I am not sure why they didn’t stay deleted when I saved after deleting them.

Has anyone else had this problem and how did they solve it? Thanks.

image