Remove the cutlist in the FM tree

I have a part that was a structure weldment, but we decided to make the part out of bent steel. So now the file is a Sheet metal part. I removed all the weldment data and all i have left is the sheet metal data, but the cut-list info is still there.

I need to know how to remove the Weldment cut-list in the tree or can I?

FYI: I don't want to make a new file, because the part is controlled by PDM. If I make a new file, I will lose the history of the file.