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>

drivers/scsi/mpt3sas/mpt3sas_debugfs.c

@@ -13,7 +13,6 @@
  *
  **/
 
-#include <linux/version.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/pci.h>