chore(cache): remove unnecessary mixed value declaration in DummyHandler

Author: yassinedoghri

system/Cache/Handlers/DummyHandler.php

@@ -36,9 +36,6 @@ public function remember(string $key, int $ttl, Closure $callback): mixed
         return null;
     }
 
-    /**
-     * @param mixed $value
-     */
     public function save(string $key, $value, int $ttl = 60): bool
     {
         return true;