[Replicant]

What part exactly are you trying to hide? Stats or all userinfo? Does it matter if it is still on the page but just hidden?

Try this code to hide postbit. Add to your css_additional.css

.userinfo {
    display: none;
}
.l-col__flex-3, .l-row__fixed--left > .l-col__flex-3 {
    margin-left: 0;
}

This will affect all threads, if you want to apply it to a single thread only, that will take a couple lines of JS.