Remove obsolete code

src/Node/SetNode.php

@@ -33,8 +33,7 @@ class SetNode extends Node implements NodeCaptureInterface
         $safe = false;
         if ($capture) {
             $safe = true;
-            // Node::class === get_class($values) should be removed in Twig 4.0
-            if (($values instanceof Nodes || Node::class === get_class($values)) && !count($values)) {
+            if ($values instanceof Nodes && !count($values)) {
                 $values = new ConstantExpression('', $values->getTemplateLine());
                 $capture = false;
             } elseif ($values instanceof TextNode) {

src/Parser.php

@@ -343,8 +343,7 @@ class Parser
 
         // here, $nested means "being at the root level of a child template"
         // we need to discard the wrapping "Node" for the "body" node
-        // Node::class !== \get_class($node) should be removed in Twig 4.0
-        $nested = $nested || (Node::class !== \get_class($node) && !$node instanceof Nodes);
+        $nested = $nested || !$node instanceof Nodes;
         foreach ($node as $k => $n) {
             if (null !== $n && null === $this->filterBodyNodes($n, $nested)) {
                 $node->removeNode($k);