diff --git a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/textbook.en.md
deleted file mode 100644
index 20fa96d30..000000000
--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/textbook.en.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-title: 'The mirror'
-published: true
-visible: true
----
-