Worked on improving documentation hygiene for the pyvista/pyvista repository by updating the API reference materials. Focused on removing an outdated mention of the .clean() method from the introductory API documentation, ensuring that the docs accurately reflect the current API surface. This change was implemented exclusively in reStructuredText (RST) files, leveraging strong documentation skills without modifying any runtime code. The update was isolated to a single documentation file, preserving codebase stability while enhancing clarity for new users. By aligning the documentation with the actual API, the work contributed to smoother onboarding and improved discoverability for developers interacting with pyvista.