[NodeManipulator] Reduce parent attribute check on PropertyManipulator (

#4377)

* [NodeManipulator] Reduce parent attribute check on PropertyManipulator

* [ci-review] Rector Rectify

---------

Co-authored-by: GitHub Action <actions@github.com>

src/NodeManipulator/PropertyManipulator.php

@@ -21,7 +21,6 @@
 use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\Node\Stmt\Property;
 use PhpParser\Node\Stmt\Trait_;
-use PhpParser\Node\Stmt\Unset_;
 use PHPStan\Analyser\Scope;
 use PHPStan\Reflection\ClassReflection;
 use PHPStan\Type\ObjectType;
@@ -184,6 +183,10 @@ private function isPropertyAssignedOnlyInConstructor(
 
     private function isChangeableContext(PropertyFetch | StaticPropertyFetch $propertyFetch, Scope $scope): bool
     {
+        if ($propertyFetch->getAttribute(AttributeKey::IS_UNSET_VAR) === true) {
+            return true;
+        }
+
         $parentNode = $propertyFetch->getAttribute(AttributeKey::PARENT_NODE);
         if (! $parentNode instanceof Node) {
             return false;
@@ -196,10 +199,6 @@ private function isChangeableContext(PropertyFetch | StaticPropertyFetch $proper
             $parentNode = $parentNode->getAttribute(AttributeKey::PARENT_NODE);
         }
 
-        if (! $parentNode instanceof Node) {
-            return false;
-        }
-
         if ($parentNode instanceof Arg) {
             $readArg = $this->variableToConstantGuard->isReadArg($parentNode);
             if (! $readArg) {
@@ -216,7 +215,7 @@ private function isChangeableContext(PropertyFetch | StaticPropertyFetch $proper
             return ! $this->readWritePropertyAnalyzer->isRead($propertyFetch, $scope);
         }
 
-        return $parentNode instanceof Unset_;
+        return false;
     }
 
     private function isFoundByRefParam(MethodCall | StaticCall $node, Scope $scope): bool