Drupal 7 force uninstall of disabled modules.

drupal7-force-modules-uninstall.php

<?php

  // get disabled modules, skip 'test' modules
  $modules = db_query("SELECT `name` FROM {system} WHERE TYPE = 'module' AND `status` = 0 AND `name` NOT LIKE '%test%' ORDER BY `name` DESC")->fetchCol();

  // ensure disabled
  module_disable($modules);

  // force uninstall
  foreach ($modules as $module) {
    // Uninstall the module.
    module_load_install($module);
    module_invoke($module, 'uninstall');
    drupal_uninstall_schema($module);

    watchdog('system', '%module module uninstalled.', array('%module' => $module), WATCHDOG_INFO);
    drupal_set_installed_schema_version($module, SCHEMA_UNINSTALLED);
  }