Remove dead code

Delete unused functions.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10470

module/os/linux/zfs/zfs_vnops.c

@@ -4562,25 +4562,6 @@ zfs_inactive(struct inode *ip)
 		rw_exit(&zfsvfs->z_teardown_inactive_lock);
 }
 
-/*
- * Bounds-check the seek operation.
- *
- *	IN:	ip	- inode seeking within
- *		ooff	- old file offset
- *		noffp	- pointer to new file offset
- *
- *	RETURN:	0 if success
- *		EINVAL if new offset invalid
- */
-/* ARGSUSED */
-int
-zfs_seek(struct inode *ip, offset_t ooff, offset_t *noffp)
-{
-	if (S_ISDIR(ip->i_mode))
-		return (0);
-	return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0);
-}
-
 /*
  * Fill pages with data from the disk.
  */

module/os/linux/zfs/zvol_os.c

@@ -713,12 +713,6 @@ zvol_find_by_dev(dev_t dev)
 	return (NULL);
 }
 
-void
-zvol_validate_dev(zvol_state_t *zv)
-{
-	ASSERT3U(MINOR(zv->zv_zso->zvo_dev) & ZVOL_MINOR_MASK, ==, 0);
-}
-
 static struct kobject *
 zvol_probe(dev_t dev, int *part, void *arg)
 {