/**
 * Implements hook_filetransfer_info_alter().
 */
function {{ machine_name }}_filetransfer_info_alter(&$filetransfer_info) {
  // Remove the FTP option entirely.
  unset($filetransfer_info['ftp']);
  // Make sure the SSH option is listed first.
  $filetransfer_info['ssh']['weight'] = -10;
}