xfs: remove duplicate wq cancel and log force from attr quiesce

These two calls are repeated at the beginning of xfs_log_quiesce().
Drop them from xfs_quiesce_attr().

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>