Disassociate bins with items

Is there a way to mass update item records to disassociate bins? We moved in to a new warehouse and created a hole new bin numbering structure. I was able to easily upload the new bins and mass update to associate the new bins to their item records and transferred the inventory. Now I need to remove the old bins from the item records. I know you can use Overwrite Subsists but the problem is I have item records that have more than one bin in the new warehouse. After I disassociate the old bins I would like to delete