gpiolib: remove set but not used variable 'config'

drivers/gpio/gpiolib.c: In function gpio_set_config:
drivers/gpio/gpiolib.c:3053:16: warning:
 variable config set but not used [-Wunused-but-set-variable]

commit d90f368 ("gpiolib: have a single place
of calling set_config()") left behind this unused variable.

Reported-by: Hulk Robot <[email protected]>
Signed-off-by: YueHaibing <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Bartosz Golaszewski <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>

Author: YueHaibing

drivers/gpio/gpiolib.c

@@ -3043,7 +3043,6 @@ static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset,
 static int gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 			   enum pin_config_param mode)
 {
-	unsigned long config;
 	unsigned arg;
 
 	switch (mode) {
@@ -3057,7 +3056,6 @@ static int gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 		arg = 0;
 	}
 
-	config = PIN_CONF_PACKED(mode, arg);
 	return gpio_do_set_config(gc, offset, mode);
 }