initramfs hooks: Stop installing rules files for mdadm, lvm2 and dmsetup

Stop installing 55-dm.rules, 64-md-raid.rules,
60-persistent-storage-lvm.rules and 60-persistent-storage-dm.rules.
The mdadm, lvm2 and dmsetup package provide their own udev hooks
nowadays to make sure their udev rules files are installed into the
initramfs.  Having the copy rules at two places is confusing and makes
debugging harder.