ml-online.tex defines `\l` as L

[jemus42]

\l is already defined, hence the need for renewcommand.

• It causes warnings in the preview: LaTeX Warning: Command \l invalid in math mode on input line XYZ.
• It looks wrong in the preview PDF, not sure why \l is not correctly defined there.

[jemus42]

Made the executive decision to just remove that definition, as it seems awfully superfluous to define \l as a simple L anyway and removing ti gets rid of these warnings.

Only affected lectures/slides are advML where that file is used, keeping this here for posterity:

❯ rgf -l -u "ml-online" --iglob '!latex-math' --glob '*.tex'
online-learning/slides-online-learning-simple-learners-ftrl.tex
online-learning/slides-online-learning-oco.tex
online-learning/slides-online-learning-simple-learners.tex
online-learning/slides-online-learning-intro.tex
online-learning/slides-online-learning-simple-learners-ftl-olo.tex
online-learning/slides-online-learning-oco-1.tex
online-learning/slides-online-learning-simple-learners-ftl-oqo-deep-dive.tex
online-learning/slides-online-learning-oco-2.tex