spi: spi-cadence: Delete unmatched comments

The function no longer returns a value, synchronize the comments.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230712064832.67091-1-frank.li@vivo.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-cadence.c

@@ -690,8 +690,6 @@ static int cdns_spi_probe(struct platform_device *pdev)
  * This function is called if a device is physically removed from the system or
  * if the driver module is being unloaded. It frees all resources allocated to
  * the device.
- *
- * Return:	0 on success and error value on error
  */
 static void cdns_spi_remove(struct platform_device *pdev)
 {