So I thought I found a way to do this with the follwoing method:
1) Right Click and set the computer to 'Retired'
2) Right Click and run the Cleanup Inventory CMDB task.
Result:
Wipes out basic machine info and seems to take the machine out of the Filter Membership, but NOT the actual filter as a resource. See attached file.
Any ideas why the machine is not in the Filter membership when i perform the above tasks, BUT is still a resource in the filter?