Drop dmsetup from rootwrap
The 'dmsetup' command is not being used anywhere so remove it
from the volume.filters.
@@ -100,7 +100,6 @@ ionice_2: ChainingRegExpFilter, ionice, root, ionice, -c[0-3]
cgexec: ChainingRegExpFilter, cgexec, root, cgexec, -g, blkio:\S+
# cinder/volume/driver.py
-dmsetup: CommandFilter, dmsetup, root
ln: CommandFilter, ln, root
# cinder/image/image_utils.py
