STYLE: No longer set `hooks-max-size` for nifti2_io.c, doxygen.config.in

[N-Dekker]

nifti2_io.c was removed by:

• pull request https://github.com/InsightSoftwareConsortium/ITK/pull/2630 commit 68221fdd30fb9ba89219a4bd5a47870b2d1cf7e6 "ENH: Prepare for update to NIFTILIB3.0.1", 9 July 2021

The two doxygen.config.in files were removed by:

• pull request https://github.com/InsightSoftwareConsortium/ITK/pull/3311 commit a96d03fb5f4a4bb470516aa623dbc9b4aaaa6e4f "COMP: Use modern doxygen_add_docs command ITK_WRAP_DOCS", 11 March 2022
• pull request https://github.com/InsightSoftwareConsortium/ITK/pull/4500 commit 0c5c63890b2a417708b2fbcc4ebdb4e98247ef9f "STYLE: Remove doxygen.config.in (superseded by DoxygenConfig.cmake)", 12 March 2024

[N-Dekker]

Thanks for your approval @dzenanz Now I'm wondering, is there any reason to to a complete CI build when only just the ".gitattributes" file is touched? Or should it be added to the "exclude" lists in Testing/ContinuousIntegration/*.yml?

This file is specifically for ghostflow-check-master, right?