CRM-13096, drop unwanted table civicrm_official_receipt

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* CRM-13096: Table civicrm_official_receipt missing from upgrades
  http://issues.civicrm.org/jira/browse/CRM-13096
Merge pull request #1336 from kurund/CRM-13096

CRM-13096, drop unwanted table civicrm_official_receipt