Remove obsolete disk ownership workaround for Debian bug #645466
Originally created by @anonym on #11534 (Redmine)
The issue we worked around has been fixed in 2014 in systemd 204-9:
* Drop our Debian specific 60-persistent-storage{,-tape}.rules and use the
upstream rules. They are compatible and do a superset of the
functionality. (Closes: #645466)