Disable TLS 1.2 from Cipher Suite

You probably meant to disable the TLS 1.2 protocol.

Create a new SSL profile, client-side or server-side that is appropriate to your situation, and in the "Options List", select "No TLSv1.2", click on "Enable" and then save ("Update") the configuration.

Apply the new SSL profile to your virtual server.

I hope this is what you want and need to do.