[XFS] remove no-longer-needed IS_NOATIME macro, twas just a build workaround

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/linux-2.6/xfs_iops.c

@@ -56,9 +56,6 @@
 #include <linux/namei.h>
 #include <linux/security.h>
 
-#define IS_NOATIME(inode) ((inode->i_sb->s_flags & MS_NOATIME) ||	\
-	(S_ISDIR(inode->i_mode) && inode->i_sb->s_flags & MS_NODIRATIME))
-
 /*
  * Get a XFS inode from a given vnode.
  */