tty_ioctl(): drop FIONBIO handling

That code had been live for 11 weeks back in 1992, but it had been 26 years
since sys_ioctl() began handling FIONBIO on its own.  Time to to bury the body,
already...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-09-11 19:52:54 -04:00
commit a913bc76ed