materio-base-d7/sites/all/modules/contrib/admin/node_export/modules/node_export_relation/node_export_relation.install

<?php

/**
 * @file
 * The Node export relation install file.
 */

/**
 * Implements hook_uninstall().
 */
function node_export_relation_uninstall() {
  // Node reference.
  variable_del('node_export_node_reference_auto_inc');
  variable_del('node_export_node_reference_skip');

  // Organic groups.
  variable_del('node_export_og_auto_inc');
  variable_del('node_export_og_skip');
}

 /**
  * Implements hook_requirements().
  */
 function node_export_relation_requirements($phase) {
  $requirements = array();

  // Ensure translations don't break at install time
  $t = get_t();

  if (module_exists('node_export_dependency')) {
    $requirements['node_export_dependency'] = array(
      'title' => 'Node export dependency',
      'description' => $t(
        'Node export relation is deprecated in favour of Node export dependency.  You cannot use both.'
      ),
      'severity' => REQUIREMENT_ERROR,
    );
  }

  return $requirements;
}