docs: def delete_individual(self, ind_obj):
          """Delete a case from the database
  
          Args:
              ind_obj (puzzle.models.Individual): initialized individual model
          """
          logger.info("Deleting individual {0} from database"
                      .format(ind_obj.ind_id))
          self.session.delete(ind_obj)
          self.save()
          return ind_obj