tty: max3100: remove unused variable rts and remove unused assignment

Variable rts is being assigned but it is never read, hence it can be
removed.  The assignment to param_new to zero is redundant as it is
being updates a few statements later, so remove this redundant
assignment. Cleans up two clang warnings:

drivers/tty/serial/max3100.c:277:3: warning: Value stored to 'rts'
is never read
drivers/tty/serial/max3100.c:439:2: warning: Value stored to 'param_new'
is never read

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/max3100.c

@@ -263,7 +263,7 @@ static void max3100_work(struct work_struct *w)
 	struct max3100_port *s = container_of(w, struct max3100_port, work);
 	int rxchars;
 	u16 tx, rx;
-	int conf, cconf, rts, crts;
+	int conf, cconf, crts;
 	struct circ_buf *xmit = &s->port.state->xmit;
 
 	dev_dbg(&s->spi->dev, "%s\n", __func__);
@@ -274,7 +274,6 @@ static void max3100_work(struct work_struct *w)
 		conf = s->conf;
 		cconf = s->conf_commit;
 		s->conf_commit = 0;
-		rts = s->rts;
 		crts = s->rts_commit;
 		s->rts_commit = 0;
 		spin_unlock(&s->conf_lock);
@@ -436,7 +435,6 @@ max3100_set_termios(struct uart_port *port, struct ktermios *termios,
 	dev_dbg(&s->spi->dev, "%s\n", __func__);
 
 	cflag = termios->c_cflag;
-	param_new = 0;
 	param_mask = 0;
 
 	baud = tty_termios_baud_rate(termios);