Description of Problem:

The new disk druid seems to have problems deleting unused RAID groups. I 
created several sub raid parts on hda and hdb. I put two of them together 
as /boot, and tried to delete the third. Disk druid complained that I could 
not delete partitions in use.. which this one wasnt yet.

How Reproducible:
100%

Steps to Reproduce:
1. Install and make 3 subraid partitions 
2. Organize 2 into a ext3 partition
3. Delete the unused subraid partition.

Actual Results:
Unable to delete RAID partition in use

Expected Results:
Should allow for deletion or give better error message as to why not.

Additional Information: