dsa: lan9303: Remove stray gpiod_unexport() call

There is no gpiod_export() and gpiod_unexport() looks pretty much stray.
The gpiod_export() and gpiod_unexport() shouldn't be used in the code,
GPIO sysfs is deprecated. That said, simply drop the stray call.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230528142531.38602-1-andriy.shevchenko@linux.intel.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/dsa/lan9303-core.c

@@ -1462,7 +1462,6 @@ int lan9303_remove(struct lan9303 *chip)
 
 	/* assert reset to the whole device to prevent it from doing anything */
 	gpiod_set_value_cansleep(chip->reset_gpio, 1);
-	gpiod_unexport(chip->reset_gpio);
 
 	return 0;
 }