Returns a new DeleteQuery object for the active database.
$table: The table from which to delete.
$options: An array of options to control how the query operates.
DeleteQuery A new DeleteQuery object for this connection.
function db_delete($table, array $options = array()) {
  if (empty($options['target']) || $options['target'] == 'slave') {
    $options['target'] = 'default';
  }
  return Database::getConnection($options['target'])
    ->delete($table, $options);
}