xfs: remove the unused xfs_icdinode_has_bigtime helper

Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NDarrick J. Wong <djwong@kernel.org>
Signed-off-by: NDarrick J. Wong <djwong@kernel.org>

fs/xfs/libxfs/xfs_inode_buf.h

@@ -32,11 +32,6 @@ struct xfs_icdinode {
 	struct timespec64 di_crtime;	/* time created */
 };
 
-static inline bool xfs_icdinode_has_bigtime(const struct xfs_icdinode *icd)
-{
-	return icd->di_flags2 & XFS_DIFLAG2_BIGTIME;
-}
-
 /*
  * Inode location information.  Stored in the inode and passed to
  * xfs_imap_to_bp() to get a buffer and dinode for a given inode.