How can I remove my icloud

Hello Abrha

There is multiple ways to remove your iCloud account (Granted you know your password) If you go to the settings app then to General then scroll down to the bottom until you see Reset. Then select erase all contents and settings after signing out of iCloud your phone will be factory erased and all data gone. If you Don't want to remove all data and just want to remove the iCloud go to the settings app select your iCloud account (the top on the settings) there should be an option the bottom to sign out follow the prompts and you can sign out. If you have another device linked to your iCloud you can use the Find My app to remotely remove the iCloud account by selecting the device on Find My and selecting the erase option.

If you have forgotten your Apple iD password you can go to the iForgot.apple website to recovery your account. If the account is not your and you don't know the persons who's account the devices is linked to the device cannot iCloud can not be removed for more help you can look to this apple support page regarding activation locks and iCloud lock.

Hope this helps

https://al-support.apple.com/#/kbase