diff --git a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/04.fermat-principle/01.fermat-principle-main/textbook.en.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/04.fermat-principle/01.fermat-principle-main/textbook.en.md
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--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/04.fermat-principle/01.fermat-principle-main/textbook.en.md
+++ /dev/null
@@ -1,4 +0,0 @@
----
-title: 'The Fermat''s principle T'
----
-