Remove unused hsm._hsmSchedule()

Related to: BZ#960952.

Change-Id: I92b9fcd899463157951fb76ab7ac6dfb4b47caf9
Signed-off-by: Eduardo <ewarszaw@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/16411
Reviewed-by: Saggi Mizrahi <smizrahi@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>