Update textbook.fr.md

00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.fr.md

@@ -4,11 +4,9 @@ published: true
 routable: true
 visible: false
 lessons:
-    - slug: definir-g12-outil-mathematique
+    - slug: define-g12-mathematical-tools
       order: 3
-    - slug: definir-234-outil-mathematique
-      order: 1
-    - slug: define-2-mathematical-tools-polyglot
+    - slug: define-234-mathematical-tools
       order: 1
 ---