staging: r8188eu: usb_suspend_sema is initialised but not used

usb_suspend_sema from struct dvobj_priv is initialised but never used.
Remove it.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220206175925.461426-5-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/drv_types.h

@@ -139,7 +139,6 @@ struct dvobj_priv {
 
 	u8	ishighspeed;
 	u8	RtNumOutPipes;
-	struct semaphore usb_suspend_sema;
 
 	struct usb_interface *pusbintf;
 	struct usb_device *pusbdev;

drivers/staging/r8188eu/os_dep/usb_intf.c

@@ -126,7 +126,6 @@ static struct dvobj_priv *usb_dvobj_init(struct usb_interface *usb_intf)
 	}
 
 	/* 3 misc */
-	sema_init(&pdvobjpriv->usb_suspend_sema, 0);
 	rtw_reset_continual_urb_error(pdvobjpriv);
 
 	usb_get_dev(pusbd);