scsi: message: fusion: Remove unused local variable 'time_count'

scsi: message: fusion: Remove unused local variable 'time_count'

Fixes the following W=1 kernel build warning:

drivers/message/fusion/mptctl.c: In function ‘mptctl_do_taskmgmt:
drivers/message/fusion/mptctl.c:324:17: warning: variable ‘time_count’ set but not used [-Wunused-but-set-variable]

Link: https://lore.kernel.org/r/20210408061851.3089-2-thunder.leizhen@huawei.com
Fixes: 7d757f185540 ("[SCSI] mptfusion: Updated SCSI IO IOCTL error handling.")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>