Remove empty head_rotation_file_reader files
head_rotation_file_reader.c/.h were replaced with rotation_file_reader.c/.h, remove the empty files
WARNING! Gitlab maintenance operation scheduled for Saturday, 27 September 2025, from 07:00 AM to 4:00 PM GMT (09:00 AM to 6:00 PM CEST)
head_rotation_file_reader.c/.h were replaced with rotation_file_reader.c/.h, remove the empty files