Answer
Open the Settings app and go to (Your Name), or “iCloud” Scroll down under all the settings to find “Delete Account” (or “Sign Out”) and tap on that. Confirm the removal of the iCloud account from the device by tapping on “Delete” or “Sign Out”
How to Remove Icloud device from Find My iPhone | Delete iCloud Account from iPhone without Password
HOW TO TURN OFF FIND MY IPHONE AND DELETE ICLOUD ID NO PASSWORD SUCCESS 100%
How do I delete a free account from my iPhone?
Open the Settings app and go to (Your Name), or “iCloud” Scroll down under all the settings to find “Delete Account” (or “Sign Out”) and tap on that. Confirm the removal of the iCloud account from the device by tapping on “Delete” or “Sign Out”