scsi: target: tcmu: Remove unnecessary bit TCMU_CMD_BIT_INFLIGHT

scsi: target: tcmu: Remove unnecessary bit TCMU_CMD_BIT_INFLIGHT

Since commit 61fb24822166 ("scsi: target: tcmu: Userspace must not complete
queued commands") tcmu_cmd bit TCMU_CMD_BIT_INFLIGHT is set but never
checked.  So we can remove it safely.

[mkp: fixed Mike's email address]

Link: https://lore.kernel.org/r/20200619173806.5016-1-bstroesser@ts.fujitsu.com
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Acked-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>