Remove 'action_*' for tables.LinkAction

'action_past' and 'action_present' is not needed for LinkAction in
openstack_dashboard/dashboards/admin/hypervisors/compute/tables.py
'EvacuateHost'. We can remove the codes safely.

Change-Id: Ib15224003892c0419e6e2aeeb9390bdf8fda6458
Closes-bug: #1394423
Merge "Remove 'action_*' for tables.LinkAction"