[PATCH] Remove unbalanced kunmap() in NFS readdir code

The following seems to have survived the purge ..

fs/nfs/dir.c

@@ -130,7 +130,6 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
 	return 0;
  error:
 	SetPageError(page);
-	kunmap(page);
 	unlock_page(page);
 	invalidate_inode_pages(inode->i_mapping);
 	desc->error = error;