xfs: remove the redundant crc feature check in xfs_attr3_rmt_verify

We already check whether the crc feature is enabled before calling
xfs_attr3_rmt_verify(), so remove the redundant feature check in that
function.

Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>