Details:
To uninstall a certificate from your site and disable SSL protection:
1 Make sure that the certificate you want to remove is not used at the moment.
2 On your Home page, click the domain name you need and then click "SSL
Certificates" in the Additional Tools group.
3 If the certificate that you want to remove is currently in use, you should first
release it: in the Certificate drop-down box, select another certificate and click OK.
4 Remove the certificate from repository.
5 To permanently remove the certificate from repository, on your Home page, click
the domain name you need and then click Certificates in the Services group.
6 Select a check box corresponding to the certificate that you no longer need and
click Remove Selected.
7 Confirm removal and click OK.
8 Disable SSL support if you no longer need it.
9 On your Home page, click the domain name you need and then click Setup.
10 Clear the SSL support check box and click OK.