diff --git a/core/lib/Drupal/Core/Routing/Router.php b/core/lib/Drupal/Core/Routing/Router.php
index f2ff54f..dc724bc 100644
--- a/core/lib/Drupal/Core/Routing/Router.php
+++ b/core/lib/Drupal/Core/Routing/Router.php
@@ -167,13 +167,8 @@ public function matchRequest(Request $request) {
    * @param \Symfony\Component\Routing\RouteCollection $routes
    *   The set of routes.
    *
-   * @return array
-   *   An array of parameters
-   *
-   * @throws \Symfony\Component\Routing\Exception\ResourceNotFoundException
-   *   If the resource could not be found.
-   * @throws \Symfony\Component\Routing\Exception\MethodNotAllowedException
-   *   If the resource was found but the request method is not allowed.
+   * @return array|null
+   *   An array of parameters. NULL when there is no match.
    */
   protected function matchCollection($pathinfo, RouteCollection $routes) {
     // Try a case-sensitive match.
@@ -203,11 +198,6 @@ protected function matchCollection($pathinfo, RouteCollection $routes) {
    * @return array|null
    *   An array of parameters. NULL when there is no match.
    *
-   * @throws \Symfony\Component\Routing\Exception\ResourceNotFoundException
-   *   If the resource could not be found.
-   * @throws \Symfony\Component\Routing\Exception\MethodNotAllowedException
-   *   If the resource was found but the request method is not allowed.
-   *
    * @see \Symfony\Component\Routing\Matcher\UrlMatcher::matchCollection()
    * @see \Drupal\Core\Routing\RouteProvider::getRoutesByPath()
    */