Remove broken BC shiv.

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

@@ -36,12 +36,6 @@ public function onKernelRequestPathResolve(GetResponseEvent $event) {
 
     $path = ltrim($request->getPathInfo(), '/');
 
-    // Temporary BC shiv to support automated tests that still rely on old-
-    // style dirty URLs.
-    if (isset($_GET['q'])) {
-      $path = $_GET['q'];
-    }
-
     if (empty($path)) {
       // @todo Temporary hack. Fix when configuration is injectable.
       $path = variable_get('site_frontpage', 'user');

core/lib/Drupal/Core/UrlMatcher.php

@@ -38,15 +38,6 @@ public function match($pathinfo) {
     // Symfony uses a prefixing / but we don't yet.
     $dpathinfo = ltrim($pathinfo, '/');
 
-    // Temporary BC shiv to support automated tests that still rely on old-
-    // style dirty URLs.
-    // @todo Remove this once testbot knows how to deal with Symfony-style
-    // dirty URLs.
-    if (isset($_GET['q'])) {
-      $dpathinfo = $_GET['q'];
-      $pathinfo = '/' . $dpathinfo;
-    }
-
     // Do our fancy frontpage logic.
     if (empty($dpathinfo)) {
       $dpathinfo = variable_get('site_frontpage', 'user');