fix: b-tree contains zero-ed data.

[SgtPooki]

Description

Some content in ipfs-geoip data in IPFS contain data:0 and should probably be removed.

What is needed?

From @lidel

we probably could remove it the next time b-stree is generated.
if you have time, fill issue in https://github.com/ipfs-shipyard/ipfs-geoip so we remember to clean this up next time b-tree format is revisited

References

discussion started in slack: https://filecoinproject.slack.com/archives/C03KQ8MC62Y/p1685570853644219