Remove samesite validation

Author: silverbackdan

src/DependencyInjection/Configuration.php

@@ -57,10 +57,6 @@ private function addMercureNode(ArrayNodeDefinition $rootNode): void
                             ->addDefaultsIfNotSet()
                             ->children()
                                  ->scalarNode('samesite')->defaultValue(Cookie::SAMESITE_STRICT)
-                                    ->validate()
-                                        ->ifNotInArray([Cookie::SAMESITE_STRICT, Cookie::SAMESITE_LAX, Cookie::SAMESITE_NONE])
-                                        ->thenInvalid('Invalid Mercure cookie samesite value %s')
-                                    ->end()
                                 ->end()
                             ->end()
                         ->end()