hyperv-daemons: Update for upstream removal of hv_fcopy_daemon

- Don't try to build it.
- Remove the init script, service file, and udev rule.
- Use dpkg-maintscript rm_conffile to remove the init script on
  upgrade.
- In preinst, stop the service only if upgrading from an older
  version.  In postinst do nothing with it.
- Remove it from the package description.