dgnc: don't bother with (empty) stub for TCXONC

for pity sake, that case is identical to their default: _and_ bears
an explicit comment re leaving to ldisc.  Which is what default is
doing, obviously...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-09-12 18:41:46 -04:00
commit 7ebec8d235