Input: ucb1400_ts - remove redundant variable penup

Variable penup is assigned a value but penup is never read later, it
is redundant and can be removed.
Signed-off-by: NColin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20211205000525.153999-1-colin.i.king@gmail.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/ucb1400_ts.c

@@ -186,7 +186,6 @@ static irqreturn_t ucb1400_irq(int irqnr, void *devid)
 {
 	struct ucb1400_ts *ucb = devid;
 	unsigned int x, y, p;
-	bool penup;
 
 	if (unlikely(irqnr != ucb->irq))
 		return IRQ_NONE;
@@ -196,8 +195,7 @@ static irqreturn_t ucb1400_irq(int irqnr, void *devid)
 	/* Start with a small delay before checking pendown state */
 	msleep(UCB1400_TS_POLL_PERIOD);
 
-	while (!ucb->stopped && !(penup = ucb1400_ts_pen_up(ucb))) {
-
+	while (!ucb->stopped && !ucb1400_ts_pen_up(ucb)) {
 		ucb1400_adc_enable(ucb->ac97);
 		x = ucb1400_ts_read_xpos(ucb);
 		y = ucb1400_ts_read_ypos(ucb);