lecture_iml

Remove redundant commented-out lecture-slide content from a specified `.tex` file, but only after explicit user permission and only when active content in the same file or sibling `.tex` files already covers the same pedagogical point. Use for pruning legacy commented-out frames, bullets, prose, or alternative phrasings.

Clean up active lecture slide LaTeX source while preserving content and PDF output. Use when refactoring active `.tex` slide content, normalizing frame/layout/image/math syntax, and enforcing the lecture project's helper macros.