As per https://bugzilla.redhat.com/show_bug.cgi?id=448932#c15, we should stop shipping iwl3945-kmod. The developer indicates that the newer iwl3945 is the preferred driver.
I don't think we can just drop it. We've already switched to prefer the built-in driver unless this one is installed. Someone might be reliant on it - this is no different than any other deprecated upstream software.