Q: How do I delete iphone from a device when I no longer have the device

Hello Mrsm1976,

Thanks for using Apple Support Communities.

To deauthorize devices you no longer have in your possession please follow the steps in the article below.

How do I deauthorize all of my computers?

Using one of your authorized computers, follow these steps:

1. Open your account in iTunes (you may need to sign in with your Apple ID). Or open iTunes, click Store > Sign In, and enter your Apple ID and password.
2. Click Deauthorize All.
   
   The Deauthorize All button appears only if you have more than 2 authorized computers. If you don't see the Deauthorize All button, that means you only have one authorized computer.

I deauthorized all of my computers. What should I do now?

Reauthorize each computer that you want to use with iTunes. Go to Store > Authorize this computer and enter your Apple ID and password.

Deauthorize your computer using iTunes

http://support.apple.com/kb/HT6283

Take care,

Alex H.