xfs/191-input-validation:Fix issue that the test takes too long

xfs/191-input-validation:Fix issue that the test takes too long

After this test is passed, checking filesystems will execute. Then
xfs_logprint will be failed and xfs_repair will take a long time
because there is not really creating the file system in this test
and wipefs executes before this test. So there is no need checking
filesystems.

Signed-off-by: Baihua Lu <lubaihua0331@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>