ci: test against numpy v2 (#1614)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

- **Chores**
- Streamlined dependency management by removing outdated comments and
constraints from the project configuration. This change may allow for
compatibility with newer versions of the `numpy` library.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Jinzhe Zeng <jinzhe.zeng@rutgers.edu>

Author: njzjz

pyproject.toml

@@ -65,9 +65,6 @@ test = [
     "dpgui",
     "coverage",
     "pymatgen-analysis-defects<2023.08.22",
-    # https://github.com/materialsproject/pymatgen/issues/3882
-    # https://github.com/kuelumbus/rdkit-pypi/issues/102
-    "numpy<2",
 ]
 gui = [
     "dpgui",