code: function(key) {
  			_engine.execute('BEGIN');
  			_engine.execute('DELETE FROM ' + _TABLE_NAME + ' WHERE key="' + eURI(key) + '" AND location="' + eURI(this._location) + '"');
  			_engine.execute('COMMIT');
  			this._removeKey(key);
  		}
docs: /*
  Implementation to remove an item from the storage engine.
  @see YAHOO.util.Storage._removeItem