This function is not used since the alloc_start parameter has been
obsoleted in commit 0d0c71b3 ("btrfs: obsolete and remove
mount option alloc_start").
Signed-off-by: NQu Wenruo <wqu@suse.com>
Reviewed-by: NNikolay Borisov <nborisov@suse.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>