(That mail also mentions the floppy driver is "basically orphaned" though. But evidently it's still there and builds.)
Maybe you're thinking of the floppy tape (ftape) driver, which was removed back in the 2.6.20 kernel. Though there's a project keeping an out-of-tree version of it working with recent kernels at https://github.com/dbrant/ftape
(That mail also mentions the floppy driver is "basically orphaned" though. But evidently it's still there and builds.)
Maybe you're thinking of the floppy tape (ftape) driver, which was removed back in the 2.6.20 kernel. Though there's a project keeping an out-of-tree version of it working with recent kernels at https://github.com/dbrant/ftape