code: func (s *Store) KVSDelete(idx uint64, key string) error {
  	tx := s.db.Txn(true)
  	defer tx.Abort()
  
  	// Perform the actual delete
  	if err := s.kvsDeleteTxn(tx, idx, key); err != nil {
  		return err
  	}
  
  	tx.Commit()
  	return nil
  }
docs: // KVSDelete is used to perform a shallow delete on a single key in the
  // the state store.