docs: def remove_sign_link(self, ca_name, signee_name):
          """Removes signee_name to the signee list for ca_name"""
  
          ca_record = self.get_record(ca_name)
          signee_record = self.get_record(signee_name)
          signees = ca_record['signees'] or {}
          signees = Counter(signees)
          if signee_name in signees:
              signees[signee_name] = 0
              ca_record['signees'] = signees
              signee_record['parent_ca'] = ''
          self.save()