AbstractRector: add remove node option

src/Rector/AbstractRector.php

@@ -12,6 +12,11 @@ use Rector\NodeChanger\PropertyAdder;
 
 abstract class AbstractRector extends NodeVisitorAbstract implements RectorInterface
 {
+    /**
+     * @var bool
+     */
+    protected $removeNode = false;
+
     /**
      * @var ExpressionAdder
      */
@@ -62,12 +67,29 @@ abstract class AbstractRector extends NodeVisitorAbstract implements RectorInter
                 return $newNode;
             }
 
+            if (is_int($newNode)) {
+                return $newNode;
+            }
+
             return NodeTraverser::DONT_TRAVERSE_CHILDREN;
         }
 
         return null;
     }
 
+    /**
+     * @return null|int|Node
+     */
+    public function leaveNode(Node $node)
+    {
+        if ($this->removeNode) {
+            $this->removeNode = false;
+            return NodeTraverser::REMOVE_NODE;
+        }
+
+        return $node;
+    }
+
     /**
      * @param Node[] $nodes
      * @return Node[]

src/Rector/Dynamic/FluentReplaceRector.php

@@ -6,6 +6,8 @@ use PhpParser\Node;
 use PhpParser\Node\Stmt\Nop;
 use PhpParser\Node\Stmt\Return_;
 use PhpParser\Node\Expr\Variable;
+use PhpParser\NodeTraverser;
+use Rector\Node\Attribute;
 use Rector\Rector\AbstractRector;
 
 final class FluentReplaceRector extends AbstractRector
@@ -25,8 +27,9 @@ final class FluentReplaceRector extends AbstractRector
         return $returnExpr->name === 'this';
     }
 
-    public function refactor(Node $node): Node
+    public function refactor(Node $node): ?Node
     {
-        return new Nop;
+        $this->removeNode = true;
+        return null;
     }
 }