Merge pull request #51 from ebouchut/fix/polyfill_supply_chain_attack

🔒️ Fix polyfill.io supply chain attack vulnerability

Author: ebouchut

Diff for: mkdocs.yml

@@ -49,7 +49,6 @@ markdown_extensions:
         title: Headers on this Page
 
 extra_javascript:
-    - https://polyfill.io/v3/polyfill.min.js?features=es6
     - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
 
 validation: