How do I take my card out off here

How to remove card details from iTunes: iPhone or iPad

1. Tap Settings.
2. Open iTunes & App Store.
3. Tap your Apple ID (typically your email address at the top of the screen).
4. Tap View Apple ID.
5. Tap Payment Information.
6. Tap None under Payment Type.
7. Tap Done.

Hope this helps

See the Apple Support article(s) below.

Apple ID without a credit card      

Apple ID - If you can‘t choose None when you edit your Apple ID payment information.