Electronic certificates on iOS mobiles
Skip information indexiOS How to delete your electronic certificate
It is possible to delete certificates installed on a device running iOS by accessing the system settings.
A specific certificate can be selected to remove from the profile list by going to "Settings", "General", "Profile". The window with the certificate information and the "Delete" option will be displayed.
You will be notified that changes will be made to the settings. Press "Delete".
To reinstall the certificate, see the help "How to import a valid copy of your electronic certificate on iOS devices".