power: supply: cros_usbpd: remove unused pointer 'dev'

Pointer 'dev' is being assigned but is never used hence it is
redundant and can be removed.

Cleans up clang warning:
variable 'dev' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/cros_usbpd-charger.c

@@ -378,12 +378,10 @@ static int cros_usbpd_charger_ec_event(struct notifier_block *nb,
 {
 	struct cros_ec_device *ec_device;
 	struct charger_data *charger;
-	struct device *dev;
 	u32 host_event;
 
 	charger = container_of(nb, struct charger_data, notifier);
 	ec_device = charger->ec_device;
-	dev = charger->dev;
 
 	host_event = cros_ec_get_host_event(ec_device);
 	if (host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)) {