onepilot-8.x-1.1/onepilot.install

<?php

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

  /** @var \Drupal\Core\Config\ConfigFactoryInterface $configFactory */
  $configFactory = \Drupal::configFactory();
  $logger = \Drupal::logger('amp');

  $configNames = [
    'onepilot.settings'
  ];

  foreach ($configNames as $configName) {
    try {
      $configFactory->getEditable($configName)->delete();
    }
    catch (\Exception $e) {
      $logger->warning(sprintf('Unable to uninstall config: %s.', $configName));
    }
  }
}