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Deleted 01.curriculum/01.physics-chemistry-biology/01.niv1/06.nature-of-light/02.light-colors/02.light-colors-overview/cheatsheet.en.md, 01.curriculum/01.physics-chemistry-biology/01.niv1/06.nature-of-light/02.light-colors/02.light-colors-overview/cheatsheet.es.md, 01.curriculum/01.physics-chemistry-biology/01.niv1/06.nature-of-light/02.light-colors/02.light-colors-overview/cheatsheet.fr.md files