remove unused function btrfs_ilookup

btrfs_ilookup is unused, which is good because a normal filesystem
should never have to use ilookup anyway.  Remove it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

fs/btrfs/ctree.h

@@ -1763,8 +1763,6 @@ void btrfs_destroy_cachep(void);
 long btrfs_ioctl_trans_end(struct file *file);
 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
 				struct btrfs_root *root);
-struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
-			    u64 root_objectid);
 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
 			 struct btrfs_root *root, int *is_new);
 int btrfs_commit_write(struct file *file, struct page *page,

fs/btrfs/inode.c

@@ -1818,19 +1818,6 @@ static int btrfs_find_actor(struct inode *inode, void *opaque)
 		args->root == BTRFS_I(inode)->root);
 }
 
-struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
-			    u64 root_objectid)
-{
-	struct btrfs_iget_args args;
-	args.ino = objectid;
-	args.root = btrfs_lookup_fs_root(btrfs_sb(s)->fs_info, root_objectid);
-
-	if (!args.root)
-		return NULL;
-
-	return ilookup5(s, objectid, btrfs_find_actor, (void *)&args);
-}
-
 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
 				struct btrfs_root *root)
 {