Issue #2329653 by znerol: Remove left over abstract class PathListenerBase.

core/lib/Drupal/Core/EventSubscriber/PathListenerBase.php

-<?php
-
-/**
- * @file
- * Definition of Drupal\Core\EventSubscriber\PathListenerBase.
- */
-
-namespace Drupal\Core\EventSubscriber;
-
-use Symfony\Component\HttpFoundation\Request;
-
-/**
- * Base class for listeners that are manipulating the path.
- */
-abstract class PathListenerBase {
-
-  public function extractPath(Request $request) {
-    $path = $request->attributes->get('_system_path');
-    return isset($path) ? $path : trim($request->getPathInfo(), '/');
-  }
-
-  public function setPath(Request $request, $path) {
-    $request->attributes->set('_system_path', $path);
-  }
-}

core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php

@@ -18,7 +18,7 @@
 /**
  * Provides a path subscriber that converts path aliases.
  */
-class PathSubscriber extends PathListenerBase implements EventSubscriberInterface {
+class PathSubscriber implements EventSubscriberInterface {
 
   /**
    * The alias manager that caches alias lookups based on the request.