Hey there AbeFroman_,
Thanks for reaching out to Apple Support Communities. I understand you’re having issues removing your profile pic on your iPhone. I’ll be happy to help.
How are you attempting to change this? Open the Contacts app and tap on your card. You can scroll to the top to get to this. Tap Edit in the top corner and then Edit underneath your profile pic. Mine had the letters showing there as an option under suggestions. If you don’t see that, tap Edit under the photo once more and you can delete any photos until the initials appear.
Regards.