Simplify version check (#1907)

* Simplify version check

* Simplify version check

Author: GuilhemN

Routing/Loader/RestRouteLoader.php

@@ -119,8 +119,7 @@ private function getControllerLocator($controller)
             // service_id
             $prefix = $controller.':';
 
-             // sf > 4.1 support
-            if (method_exists(Kernel::class, 'getAnnotatedClassesToCompile')) {
+            if (Kernel::VERSION_ID >= 40100) {
                 $prefix .= ':';
             }
 

Tests/Routing/Loader/RestYamlCollectionLoaderTest.php

@@ -219,7 +219,7 @@ public function testControllerAsServiceWithClassName()
 
         // We check that it's "controller:method" if sf < 4.1 (controller as service) and not "controller::method"
         $this->assertEquals(
-            UsersController::class.(!method_exists(Kernel::class, 'getAnnotatedClassesToCompile') ? ':' : '::').'getUsersAction',
+            UsersController::class.(Kernel::VERSION_ID >= 40100 ? '::' : ':').'getUsersAction',
             $route->getDefault('_controller')
         );