Ahh. That's definitely not a crDroid thing. That's a Google thing, and impossible to get rid of. You just have to live with it if you want a custom ROM (which requires an unlocked bootloader by definition). The only way to get rid of that is to go back to stock and re-lock the bootloader**.
**DO NOT RE-LOCK THE BOOTLOADER UNLESS YOU HAVE COMPLETELY GONE BACK TO STOCK OR YOU WILL BRICK YOUR PHONE.**