Hi Idk-ios,
Thanks for reaching out to Apple Support Communities. It sounds like you have a question about removing a photo for your Contact information. We're happy to assist.
We recommend attempting to change the photo to your initials from the Contacts app directly. On your iPhone tap the Contacts app to open, choose your "My Card" information, tap Edit at the top right, and then Edit under your photo to choose a non photo option.
If needed, the steps here can help as well: Add your contact info on iPhone
iCloud account photos are a bit different, and it doesn't appear that you can fully delete the image. Check out the guide here: Change your Apple ID profile picture on iCloud.com
You can also test deleting your contact information from your iPhone and adding it back to see if the information for the photo clears. If you're unable to delete any details check out the steps here to help check for restrictions: If you can’t create, import, edit, or delete contacts on iCloud.com
Best!