no need to block and unblock, CRM-14201

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* CRM-14201: Contact Relationships tab needs pagination
  http://issues.civicrm.org/jira/browse/CRM-14201
fixed enable action for past relationships CRM-14201

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* CRM-14201: Contact Relationships tab needs pagination
  http://issues.civicrm.org/jira/browse/CRM-14201