how to remove credit card info from ipod??

You can (maybe) remove your credit crd data from your iTunes account:

How To

All of your account information can be changed from the Apple Account Information page. To get to the Apple Account Information page, follow these instructions:

1. Open iTunes.
2. Choose Store > Sign In.
3. Enter your Apple ID and password, then click the Sign In button.
4. Choose Store > View My Account.
5. Enter your account password and click the View Account button.

To update your name, billing address, or payment information, follow these instructions:

1. From the Apple Account Information page, click the Edit Payment Information button.
2. Edit the information that you would like to change.Note: The payment methods that the iTunes Store accepts can be found in the payment type section. If you do not want a payment method on your account, select None in the payment type section.
3. Click the Done button once you have updated all of your information.

You can also sign out of the iTunes account on the the iPod. Go to Settings>Store and sign out.