Input: pwm-beeper - remove useless call to pwm_config()

Calling pwm_config() with a period equal to zero always results in
error (-EINVAL) and pwm chip config method is never called.
Signed-off-by: Olivier Sobrie <olivier@sobrie.be>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/pwm-beeper.c

@@ -50,7 +50,6 @@ static int pwm_beeper_event(struct input_dev *input,
 	}
 
 	if (value == 0) {
-		pwm_config(beeper->pwm, 0, 0);
 		pwm_disable(beeper->pwm);
 	} else {
 		period = HZ_TO_NANOSECONDS(value);