Replace XML routing file with bare PHP.

Resources/config/routes/cas.php

@@ -4,6 +4,6 @@
 
 return static function (RoutingConfigurator $routes) {
     $routes
-        ->import('@CasBundle/Resources/config/routes/routing.xml')
+        ->import('@CasBundle/Resources/config/routes/routes.php')
         ->prefix('/cas');
 };

src/Resources/config/routes/routes.php

@@ -0,0 +1,25 @@
+<?php
+
+use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
+use EcPhp\CasBundle\Controller\Homepage;
+use EcPhp\CasBundle\Controller\Login;
+use EcPhp\CasBundle\Controller\Logout;
+use EcPhp\CasBundle\Controller\ProxyCallback;
+
+return static function (RoutingConfigurator $routes) {
+    $routes
+        ->add('cas_bundle_homepage', '/homepage')
+        ->controller(Homepage::class);
+
+    $routes
+        ->add('cas_bundle_login', '/login')
+        ->controller(Login::class);
+
+    $routes
+        ->add('cas_bundle_logout', '/logout')
+        ->controller(Logout::class);
+
+    $routes
+        ->add('cas_bundle_proxy_callback', '/proxy/callback')
+        ->controller(ProxyCallback::class);
+};