Removed constraints for __sleep

Author: Fabio Piro

src/Minimalcode/Enumeration/AbstractEnum.php

@@ -234,14 +234,6 @@ final private function __clone()
 		throw new LogicException('Enums are not cloneable');
 	}
 
-	/**
-	 * @throws LogicException Enums are not serializable because instances are implemented as singletons
-	 */
-	final public function __sleep()
-	{
-		throw new LogicException('Enums are not serializable');
-	}
-
 	/**
 	 * @throws LogicException Enums are not serializable because instances are implemented as singletons
 	 */