Drupal: fix module has an entry in the system.schema

drupal-fix-module-has-an-entry-in-the-system-schema.php

<?php

/**
 * Removing traces of the test_marco_socialfood_workflow module after merging.
 */
function hook_update_N() {
  $schema_store = \Drupal::keyValue('system.schema');
  $schema_store->delete('module_name');

  \Drupal::database()->delete('key_value')
    ->condition('collection', 'system.schema')
    ->condition('name', 'module_name')
    ->execute();
}