migration/migration.c: Remove the MIGRATION_STATUS_ACTIVE when migration finished

The MIGRATION_STATUS_ACTIVE indicates that migration is running.
Remove it to be handled by the default operation,
It should be part of the unknown ending states.

Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
1 file changed