Clean up.

01.m3p2-curriculum/01.physics-chemistry-biology/topic.en.md

 ---
 title: 'From my perceptions of the external world,<br>To physics, chemistry, biology, and to industrial and environmental sciences'
 slug: physics-chemistry-biology
-content:
-    items: '@self.modular'
-    order:
-        by: ''
-        dir: ''
 ---
 

01.m3p2-curriculum/01.physics-chemistry-biology/topic.es.md

 ---
 title: 'De mis percepciones del mundo físico exterior,<br> a las ciencias físicas, químicas, biológicas, ecológicas y las ciencias industriales y ambientales'
 slug: physics-chemistry-biology
-content:
-    items: '@self.modular'
-    order:
-        by: ''
-        dir: ''
 ---
 

01.m3p2-curriculum/01.physics-chemistry-biology/topic.fr.md

 ---
 title: 'De mes perceptions du monde extérieur,<br> À la physique, la chimie, la biologie, et les sciences industrielles et environnementales'
 slug: physique-chimie-biologie
-content:
-    items: '@self.modular'
-    order:
-        by: ''
-        dir: ''
 ---