Implements hook_uninstall().
function update_uninstall() {
// Clear any variables that might be in use
$variables = array(
'update_check_frequency',
'update_fetch_url',
'update_last_check',
'update_last_email_notification',
'update_notification_threshold',
'update_notify_emails',
'update_max_fetch_attempts',
'update_max_fetch_time',
);
foreach ($variables as $variable) {
variable_del($variable);
}
$queue = DrupalQueue::get('update_fetch_tasks');
$queue
->deleteQueue();
}