Move callback classRemove outside of the loop

Closes #3200706

core/lib/Drupal/Core/Form/ConfigFormBaseTrait.php

@@ -37,7 +37,6 @@ trait ConfigFormBaseTrait {
    *   not.
    */
   protected function config($name) {
-    /** @var \Drupal\Core\Config\ConfigFactoryInterface $config_factory */
     if (method_exists($this, 'configFactory')) {
       $config_factory = $this->configFactory();
     }