Remove redundant "Polyfill" section

[vabushkevich]

Summary

Removed redundant "Polyfill" section.

Motivation

The documents already have a link to the polyfill in the "See also" section. Also, almost all documents that have a link to the polyfill contain it in the "See also" section, not in a separate section.

Metadata

• Adds a new document
• Rewrites (or significantly expands) a document
• Fixes a typo, bug, or other error

[github-actions]

Preview URLs

• https://pr13425.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/Fetch_API/Using_Fetch
• https://pr13425.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/Web_Animations_API/Web_Animations_API_Concepts
• https://pr13425.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/atob

Flaws

Note! 1 document with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/API/Web_Animations_API/Web_Animations_API_Concepts
Title: Web Animations API Concepts
on GitHub
Flaw count: 1

• broken_links:
  • Is currently http:// but can become https://

---

URL: /en-US/docs/Web/API/atob
Title: atob()
on GitHub
Flaw count: 2

• macros:
  • wrong xref macro used (consider changing which macro you use)
  • wrong xref macro used (consider changing which macro you use)

External URLs

URL: /en-US/docs/Web/API/Web_Animations_API/Web_Animations_API_Concepts
Title: Web Animations API Concepts
on GitHub

• https://codepen.io/collection/bpEza/ (1 time)
• https://drafts.csswg.org/css-animations-1/ (1 time)
• https://drafts.csswg.org/css-transitions/ (1 time)
• https://github.com/web-animations/web-animations-js (1 time)
• https://hacks.mozilla.org/2016/08/animating-like-you-just-dont-care-with-element-animate/ (1 time)

---

URL: /en-US/docs/Web/API/Fetch_API/Using_Fetch
Title: Using the Fetch API
on GitHub

• https://fetch.spec.whatwg.org/ (2 times)
• https://github.com/github/fetch (1 time)
• Make fetch() use "same-origin" credentials by default whatwg/fetch#585 (1 time)

---

URL: /en-US/docs/Web/API/atob
Title: atob()
on GitHub

• https://github.com/zloirock/core-js (2 times)

[sideshowbarker]

👍 Thanks