spi: spi-gpio: Remove set but not used variable 'pdata'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/spi/spi-gpio.c: In function 'spi_gpio_remove':
drivers/spi/spi-gpio.c:450:33: warning:
 variable 'pdata' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-gpio.c

@@ -447,10 +447,8 @@ static int spi_gpio_probe(struct platform_device *pdev)
 static int spi_gpio_remove(struct platform_device *pdev)
 {
 	struct spi_gpio			*spi_gpio;
-	struct spi_gpio_platform_data	*pdata;
 
 	spi_gpio = platform_get_drvdata(pdev);
-	pdata = dev_get_platdata(&pdev->dev);
 
 	/* stop() unregisters child devices too */
 	spi_bitbang_stop(&spi_gpio->bitbang);