leds: gpio: Remove unneeded assignment

The initial ret is not used anywhere, drop the unneeded assignment.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231016161005.1471768-5-andriy.shevchenko@linux.intel.com


Signed-off-by: Lee Jones <lee@kernel.org>