Removed obsolete @var in ExtendObjectPropertiesMatchingPatternPropertiesPostProcessor

There's no variable in this scope by that name.

This was found by [PHPStan](https://phpstan.org) on level 2.

Author: dktapps

src/SchemaProcessor/PostProcessor/Internal/ExtendObjectPropertiesMatchingPatternPropertiesPostProcessor.php

@@ -50,7 +50,6 @@ public function getCode(PropertyInterface $property, bool $batchUpdate = false):
 
                     $matchesAnyPattern = false;
 
-                    /** @var PatternPropertiesValidator $patternPropertiesValidator */
                     foreach (array_keys($json['patternProperties']) as $pattern) {
                         if (preg_match("/{$pattern}/", $property->getName())) {
                             $matchesAnyPattern = true;