xfs: remove unlikely() from WARN_ON() condition

"unlikely(WARN_ON(x))" is excessive. WARN_ON() already uses unlikely()
internally.

Link: http://lkml.kernel.org/r/20190829165025.15750-7-efremov@linux.comSigned-off-by: Denis Efremov <efremov@linux.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/xfs/xfs_buf.c

@@ -2097,7 +2097,7 @@ xfs_verify_magic(
 	int			idx;
 
 	idx = xfs_sb_version_hascrc(&mp->m_sb);
-	if (unlikely(WARN_ON(!bp->b_ops || !bp->b_ops->magic[idx])))
+	if (WARN_ON(!bp->b_ops || !bp->b_ops->magic[idx]))
 		return false;
 	return dmagic == bp->b_ops->magic[idx];
 }
@@ -2115,7 +2115,7 @@ xfs_verify_magic16(
 	int			idx;
 
 	idx = xfs_sb_version_hascrc(&mp->m_sb);
-	if (unlikely(WARN_ON(!bp->b_ops || !bp->b_ops->magic16[idx])))
+	if (WARN_ON(!bp->b_ops || !bp->b_ops->magic16[idx]))
 		return false;
 	return dmagic == bp->b_ops->magic16[idx];
 }