Confirm whether Polygon3 is still required

Hi VLMEvalKit maintainers,

I noticed that Polygon3 is currently listed as a dependency in:

• requirements.txt
• vlmeval/dataset/utils/Ocrbench_v2/requirements.txt

Polygon3 includes the General Polygon Clipper (GPC) component. Its PyPI metadata lists the license as LGPL for Polygon, other for gpc and includes Other/Proprietary License, which can create issues for commercial users because GPC has separate licensing terms.

I searched the current codebase and did not find any imports or direct usage of Polygon3, polygon3, or GPC outside those requirement files. Could you confirm whether this dependency is still required?

If it is unused, I would be happy to submit a PR removing it from the requirements files. If it is only needed for a specific benchmark path, another option may be to move it out of the default install path and document it as an optional benchmark-specific dependency.

Thanks.

Start by reviewing requirements.txt and vlmeval/dataset/utils/Ocrbench_v2/requirements.txt, then search the repository for Polygon3, polygon3, and GPC references. Confirm whether any benchmark path depends on it; done means determining whether it can be removed from the default requirements or needs to remain documented as an optional dependency.