farmOS/modules/farm/farm_mapknitter/farm_mapknitter.install

<?php
/**
 * @file
 * Farm MapKnitter install code.
 */

/**
 * Implements hook_uninstall().
 */
function farm_mapknitter_uninstall() {

  // Clean up variables.
  variable_del('farm_mapknitter_title');
  variable_del('farm_mapknitter_slug');
}