CRM-13490 : the concept used for fixing this is - detach the 'required' form rule...

CRM-13490 : the concept used for fixing this is - detach the 'required' form rule for address custom data field, check if the address is filled i.e. intended to be submitted if 'yes' then check for 'required' custom field form rule

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* CRM-13490: Addresses with required custom fields can't be deleted from the Edit screen
  http://issues.civicrm.org/jira/browse/CRM-13490