Ian contributed to the openssl/openssl repository by performing a targeted codebase cleanup focused on removing the obsolete asn1_mac.h header. This work involved carefully updating C source files and Makefile configurations to eliminate dependencies on the outdated header, ensuring that the build system remained stable and free from regressions. By propagating changes across related configuration and build files, Ian reduced the maintenance burden and minimized the risk of header misuse in future development. The effort demonstrated a disciplined approach to code maintenance and build system management, resulting in a cleaner, more maintainable codebase without introducing new features or bug fixes.