diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/42.relativistic-mechanics/20.n2/10.main/textbook.en.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/42.relativistic-mechanics/20.n2/10.main/textbook.en.md
deleted file mode 100644
index 5219842ce..000000000
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/42.relativistic-mechanics/20.n2/10.main/textbook.en.md
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@@ -1,15 +0,0 @@
----
-title: les relativités niveau 2
-published: true
-routable: true
-visible: false
-lessons:
-    - slug: relativity-linear-2
-      order: 1
-    - slug: relativity-123-main-panorama
-      order: 2
-    - slug: relativity-234-main-panorama
-      order: 1
----
-
-Les relativités niveau 2 : main
\ No newline at end of file