Drop support for unserializing old serialization formats

lib/Doctrine/ORM/Query/ParserResult.php

@@ -17,12 +17,6 @@
  */
 class ParserResult
 {
-    private const LEGACY_PROPERTY_MAPPING = [
-        'sqlExecutor' => '_sqlExecutor',
-        'resultSetMapping' => '_resultSetMapping',
-        'parameterMappings' => '_parameterMappings',
-    ];
-
     /**
      * The SQL executor used for executing the SQL.
      */
@@ -121,20 +115,4 @@ public function getSqlParameterPositions(string|int $dqlPosition): array
     {
         return $this->parameterMappings[$dqlPosition];
     }
-
-    public function __wakeup(): void
-    {
-        $this->__unserialize((array) $this);
-    }
-
-    /** @param array<string, mixed> $data */
-    public function __unserialize(array $data): void
-    {
-        foreach (self::LEGACY_PROPERTY_MAPPING as $property => $legacyProperty) {
-            $this->$property = $data[sprintf("\0%s\0%s", self::class, $legacyProperty)]
-                ?? $data[sprintf("\0%s\0%s", self::class, $property)]
-                ?? $this->$property
-                ?? null;
-        }
-    }
 }