Deleted...

Deleted 01.curriculum/01.physics-chemistry-biology/01.niv1/06.nature-of-light/01.light-intensity/01.light-intensity-main/textbook.en.md, 01.curriculum/01.physics-chemistry-biology/01.niv1/06.nature-of-light/01.light-intensity/01.light-intensity-main/textbook.es.md, 01.curriculum/01.physics-chemistry-biology/01.niv1/06.nature-of-light/01.light-intensity/01.light-intensity-main/textbook.fr.md files