staging: r8188eu/core: remove the check for NULL pointer in _rtw_enqueue_cmd()

Remove the check for _rtw_enqueue_cmd(), because
rtw_enqueue_cmd() already has a check of NULL pointer,
so this condition is not possible.

Signed-off-by: Qiang Ma <maqianga@uniontech.com>
Link: https://lore.kernel.org/r/20210616125332.31674-1-maqianga@uniontech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_cmd.c

@@ -72,17 +72,12 @@ static int _rtw_enqueue_cmd(struct __queue *queue, struct cmd_obj *obj)
 {
 	unsigned long irqL;
 
-	if (!obj)
-		goto exit;
-
 	spin_lock_irqsave(&queue->lock, irqL);
 
 	list_add_tail(&obj->list, &queue->queue);
 
 	spin_unlock_irqrestore(&queue->lock, irqL);
 
-exit:
-
 	return _SUCCESS;
 }