leds: max77650: Remove set but not used variable 'parent'

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

drivers/leds/leds-max77650.c: In function max77650_led_probe:
drivers/leds/leds-max77650.c:67:17: warning: variable parent set but not used [-Wunused-but-set-variable]

It is never used and can be removed.

Signed-off-by: YueHaibing <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

drivers/leds/leds-max77650.c

···
 {
 	struct device_node *of_node, *child;
 	struct max77650_led *leds, *led;
-	struct device *parent;
 	struct device *dev;
 	struct regmap *map;
 	const char *label;
···
 	u32 reg;
 
 	dev = &pdev->dev;
-	parent = dev->parent;
 	of_node = dev->of_node;
 
 	if (!of_node)