staging: exfat: remove duplicated include from exfat_super.c

Remove duplicated include.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190905025608.61884-1-yuehaibing@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/exfat/exfat_super.c

@@ -26,7 +26,6 @@
 #include <linux/sched.h>
 #include <linux/fs_struct.h>
 #include <linux/namei.h>
-#include <linux/time.h>
 
 #include <linux/string.h>
 #include <linux/nls.h>