feat: replace smooth scroll js with css scroll-behavior

assets/data/cdn/jsdelivr.yml

@@ -9,8 +9,6 @@ libFiles:
   fontawesomeFreeCSS: '@fortawesome/fontawesome-free@6.1.1/css/all.min.css'
   # animate.css@4.1.1 https://github.com/daneden/animate.css
   animateCSS: animate.css@4.1.1/animate.min.css
-  # smooth-scroll@16.1.3 https://github.com/cferdinandi/smooth-scroll
-  smoothScrollJS: smooth-scroll@16.1.3/dist/smooth-scroll.min.js
   # autocomplete.js@0.38.1 https://github.com/algolia/autocomplete.js
   autocompleteJS: autocomplete.js@0.38.1/dist/autocomplete.min.js
   # lunr.js@2.3.9 https://lunrjs.com/

assets/data/polyfill.yml

@@ -4,10 +4,6 @@ theme:
   - Promise
   - fetch
   - Element.prototype.after
-smooth-scroll:
-  - Element.prototype.closest
-  - requestAnimationFrame
-  - CustomEvent
 algoliasearch:
   - Promise
   - Object.entries