remove `sortedcontainers`

### Apache Iceberg version

None

### Please describe the bug 🐞

Context: https://github.com/apache/iceberg-python/pull/2918#discussion_r2717372566

### Willingness to contribute

- [ ] I can contribute a fix for this bug independently
- [ ] I would be willing to contribute a fix for this bug with guidance from the Iceberg community
- [ ] I cannot contribute a fix for this bug at this time