net: hns3: Remove duplicated include

Remove duplicated include.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20201031024940.29716-1-yuehaibing@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c

@@ -4,7 +4,6 @@
 #include "hclge_main.h"
 #include "hclge_dcb.h"
 #include "hclge_tm.h"
-#include "hclge_dcb.h"
 #include "hnae3.h"
 
 #define BW_PERCENT	100