platform/x86: huawei-wmi: Remove unnecessary battery mutex

battery_lock mutex is never used and not needed.

Fixes: 355a070b09ab ("platform/x86: huawei-wmi: Add battery charging thresholds")
Signed-off-by: Ayman Bagabas <[e-mail]>
Signed-off-by: Andy Shevchenko <[e-mail]>

drivers/platform/x86/huawei-wmi.c

···
 	struct led_classdev cdev;
 	struct device *dev;
 
-	struct mutex battery_lock;
 	struct mutex wmi_lock;
 };
 
···
 
 	if (wmi_has_guid(HWMI_METHOD_GUID)) {
 		mutex_init(&huawei_wmi->wmi_lock);
-		mutex_init(&huawei_wmi->battery_lock);
 
 		huawei_wmi_leds_setup(&pdev->dev);
 		huawei_wmi_fn_lock_setup(&pdev->dev);