[GFS2] Remove some unused code

Remove some of the unused code flagged up by Adrian Bunk.

Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Steven Whitehouse

fs/gfs2/bmap.c

@@ -48,37 +48,6 @@ struct strip_mine {
 	unsigned int sm_height;
 };
 
-/**
- * @gfs2_unstuffer_sync - Synchronously unstuff a dinode
- * @ip:
- * @dibh:
- * @block:
- * @private:
- *
- * Cheat and use a metadata buffer instead of a data page.
- *
- * Returns: errno
- */
-#if 0
-int gfs2_unstuffer_sync(struct gfs2_inode *ip, struct buffer_head *dibh,
-			uint64_t block, void *private)
-{
-	struct buffer_head *bh;
-	int error;
-
-	bh = gfs2_meta_new(ip->i_gl, block);
-
-	gfs2_buffer_copy_tail(bh, 0, dibh, sizeof(struct gfs2_dinode));
-
-	set_buffer_dirty(bh);
-	error = sync_dirty_buffer(bh);
-
-	brelse(bh);
-
-	return error;
-}
-#endif  /*  0  */
-
 /**
  * gfs2_unstuff_dinode - Unstuff a dinode when the data has grown too big
  * @ip: The GFS2 inode to unstuff