diff --git a/01.curriculum/01.physics-chemistry-biology/04.Niv4/topics.en.md b/01.curriculum/01.physics-chemistry-biology/04.Niv4/topics.en.md
deleted file mode 100644
index a24e3e6b6..000000000
--- a/01.curriculum/01.physics-chemistry-biology/04.Niv4/topics.en.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: hills
-slug: hills
----
-
diff --git a/01.curriculum/01.physics-chemistry-biology/04.Niv4/topics.fr.md b/01.curriculum/01.physics-chemistry-biology/04.Niv4/topics.fr.md
deleted file mode 100644
index 9dbab7a59..000000000
--- a/01.curriculum/01.physics-chemistry-biology/04.Niv4/topics.fr.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: montagnes
-slug: mountains
----
-