diff --git a/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/04.electromagnetism-in-media/05.electromagnetic-waves-diffusion-by-particules/.gitkeep b/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/04.electromagnetism-in-media/05.electromagnetic-waves-diffusion-by-particules/.gitkeep deleted file mode 100644 index e69de29bb..000000000