Remove needless calls to defined()

Author: nicolas-grekas

Extension/YamlExtension.php

@@ -36,11 +36,7 @@ public function encode(mixed $input, int $inline = 0, int $dumpObjects = 0): str
 
         $dumper ??= new YamlDumper();
 
-        if (\defined('Symfony\Component\Yaml\Yaml::DUMP_OBJECT')) {
-            return $dumper->dump($input, $inline, 0, $dumpObjects);
-        }
-
-        return $dumper->dump($input, $inline, 0, false, $dumpObjects);
+        return $dumper->dump($input, $inline, 0, $dumpObjects);
     }
 
     public function dump(mixed $value, int $inline = 0, int $dumpObjects = 0): string