Update 02.niv2/frontmatter.yaml, 02.niv2/topic.en.md, 02.niv2/topic.es.md, 02.niv2/topic.fr.md, 04.niv4/frontmatter.yaml, 04.niv4/topic.en.md, 04.niv4/topic.es.md, 04.niv4/topic.fr.md files
Deleted 01.physics-chemistry-biology/02.niv2/frontmatter.yaml, 01.physics-chemistry-biology/02.niv2/topic.en.md, 01.physics-chemistry-biology/02.niv2/topic.es.md, 01.physics-chemistry-biology/02.niv2/topic.fr.md, 01.curriculum/01.physics-chemistry-biology/04.Niv4/frontmatter.yaml, 01.curriculum/01.physics-chemistry-biology/04.Niv4/topic.en.md, 01.curriculum/01.physics-chemistry-biology/04.Niv4/topic.es.md, 01.curriculum/01.physics-chemistry-biology/04.Niv4/topic.fr.md files