I was experimenting with self-signed certificates and while viewing my website from Safari on an iPhone I first got the warning that it is an untrusted site and I could review the details of the certificate. I then tapped the "Accept" button in the top right corner and continued to browse the site. Now Safari is not asking me again when visiting my site. No matter if I clear history or go to Safari settings and choose Clear Cookies and Data and even If I restart my phone.
Obviously there is an option to completely reset all iPhone settings but that is highly inconvenient to just remove a certificate you no longer need.
Am I missing something? Is there a way to remove that particular certificate?