refs #3460219 Implemented missing method.

Fixes issue:

Fatal error: Class Drupal\config_track\Extension\ModuleHandler contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Drupal\Core\DestructableInterface::destruct) in /app/drupal/modules/contrib/config_track/src/Extension/ModuleHandler.php on line 15

Closes #3460219

src/Extension/ModuleHandler.php

@@ -285,4 +285,11 @@ class ModuleHandler implements ModuleHandlerInterface {
     return $this->innerModuleHandler->getName($module);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function destruct() {
+    // TODO: Implement destruct() method.
+  }
+
 }