scsi: mvsas: remove unused symbol 'mvs_th'

This symbol has no users so remove it.

Link: https://lore.kernel.org/r/20200415085053.7633-1-yanaijie@huawei.comSigned-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mvsas/mv_init.c

@@ -759,8 +759,6 @@ static DEVICE_ATTR(interrupt_coalescing,
 			 mvs_show_interrupt_coalescing,
 			 mvs_store_interrupt_coalescing);
 
-/* task handler */
-struct task_struct *mvs_th;
 static int __init mvs_init(void)
 {
 	int rc;