Remove duplicated include for delay.h.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: NHeiko Stuebner <heiko.stuebner@bq.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>