Remove preprocessor conditionals that are always true

In a previous commit, we made USE_TERMIOS unconditionally defined.
Let's just remove it, and remove the condition everywhere.

Reported-by: Iker Pedrosa <ipedrosa@redhat.com>
Cc: Christian Göttsche <cgzones@googlemail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

src/sulogin.c

@@ -67,13 +67,11 @@ static void catch_signals (unused int sig)
 	TERMIO termio;
 	int err = 0;
 
-#ifdef	USE_TERMIOS
 	tcgetattr (0, &termio);
 	termio.c_iflag |= (ICRNL | IXON);
 	termio.c_oflag |= (CREAD);
 	termio.c_lflag |= (ECHO | ECHOE | ECHOK | ICANON | ISIG);
 	tcsetattr (0, TCSANOW, &termio);
-#endif
 
 	Prog = Basename (argv[0]);
 	log_set_progname(Prog);