Remove User Certifixate on Nexus 4

[aloaraycr]

Hi, i have Android 4.3 and a N4

I installed a User Certificate from Realms.Pocketmine.net , when i installed i put a name and put it on VPN and Apps. Then forced me to put a PIN, but know i want to remove it and clear the password. When i go to: Config>Security>Trusted Certificates, i cant find it, neither On System por User certificates, but i dont know if the "Remove all certificates " option, remover only user installed or ALL certificates.