video: backlight: tosa_lcd: drop check because i2c_unregister_device() is NULL safe

No need to check the argument of i2c_unregister_device() because the
function itself does it.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/video/backlight/tosa_lcd.c

@@ -222,8 +222,7 @@ static int tosa_lcd_remove(struct spi_device *spi)
 {
 	struct tosa_lcd_data *data = spi_get_drvdata(spi);
 
-	if (data->i2c)
-		i2c_unregister_device(data->i2c);
+	i2c_unregister_device(data->i2c);
 
 	tosa_lcd_tg_off(data);