Default [Q] update window during rom boot


I just intalled a custom kitkat rom for locked and unlocked bootloader :

My bootloader is locked.

It works great but during each boot, I have a message that says : Update android, launch applications. It lasts 2 or 3 seconds but it's annoying.

I post here because I'm not a developer so I can't post on the rom post.

Sorry for my english, I'm french.

Thanks by advance !