scsi: mpt3sas: Remove unused including <linux/version.h>

Fix the following versioncheck warning:

drivers/scsi/mpt3sas/mpt3sas_debugfs.c:16:1: unused including <linux/version.h>

Link: https://lore.kernel.org/r/1588938573-57847-1-git-send-email-zou_wei@huawei.com


Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Samuel Zou <zou_wei@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>